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  • [ONLINE TUTORING AVAILABLE]⁠

    Get extra help on Math, Physics or Mechanical Engineering courses from tutor Matt!⁠
    ⁠⁠...⁠
    Check out his profile for more details. Link in bio☝️⁠⁠
    ...⁠
    Sign up as a student is FREE 😮⁠
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  •  3  1  5 hours ago
  • Starhopper: Raptor Engine

Starship Development Series, Part 2

Continuing with series, let's learn a bit about the Raptor Engine.
In July 2019, the Starhopper made its initial flight test, a "hop" of approximately 20 m (66 ft) altitude, and a second and final "hop" in August, reaching an altitude of approximately 150 m (490 ft) and landing approximately 100 m (110 yds) from the launchpad, demonstrating the first use of the Raptor engine in real flight. With these small hops, the Raptor engine became the first full-flow staged combustion rocket engine ever flown.

The Raptor engine will be used in both the stages of the Starship. Raptor is a one-of-its-kind full-flow staged combustion engine using methane and oxygen as the propellants. While Falcon 9 and Falcon Heavy are powered by Merlin engines, which are gas generator based open cycle engines, Starship had to go with the Raptor engine.

We will be discussing the working and reasons for the usage of this engine in the coming posts, in detail.

Please mention your questions in regards to Starhopper and Raptor engines in comments and we will cover it in our next posts.

To be continued …

Was it informative? Any questions? Let us know in comments.
~~
Check link in bio for 👇👇
📚 📚 📚 📚
Free ebook on Falcon 9.
🚀 🚀 🚀 🚀
Fundamentals of Rocket Science, 8h video series.
♠️ ♦️ ♠️ ♦️
Playing cards on Rocket Science.
📧 📧 📧 📧
Free Weekly Email newsletters on Rockets & Space.
>>>>>
And also our Telgram Channel.

#space #spacex #spacexlanding #spacestation #spacefacts #spaceflight #spacecraft #spacexrocketlaunch #spacexfalconheavy #falcon9 #falcon9launch #falcon9landing #astronomy #BFR #starship #astrophysics #darkenergy #onlinecourses #onlinecourse #rocketscience #physicsfun #galaxies #physicslove #darkmatter #physics_lab #aerospace #aerospaceengineer #rocketslove
  • Starhopper: Raptor Engine

    Starship Development Series, Part 2

    Continuing with series, let's learn a bit about the Raptor Engine.
    In July 2019, the Starhopper made its initial flight test, a "hop" of approximately 20 m (66 ft) altitude, and a second and final "hop" in August, reaching an altitude of approximately 150 m (490 ft) and landing approximately 100 m (110 yds) from the launchpad, demonstrating the first use of the Raptor engine in real flight. With these small hops, the Raptor engine became the first full-flow staged combustion rocket engine ever flown.

    The Raptor engine will be used in both the stages of the Starship. Raptor is a one-of-its-kind full-flow staged combustion engine using methane and oxygen as the propellants. While Falcon 9 and Falcon Heavy are powered by Merlin engines, which are gas generator based open cycle engines, Starship had to go with the Raptor engine.

    We will be discussing the working and reasons for the usage of this engine in the coming posts, in detail.

    Please mention your questions in regards to Starhopper and Raptor engines in comments and we will cover it in our next posts.

    To be continued …

    Was it informative? Any questions? Let us know in comments.
    ~~
    Check link in bio for 👇👇
    📚 📚 📚 📚
    Free ebook on Falcon 9.
    🚀 🚀 🚀 🚀
    Fundamentals of Rocket Science, 8h video series.
    ♠️ ♦️ ♠️ ♦️
    Playing cards on Rocket Science.
    📧 📧 📧 📧
    Free Weekly Email newsletters on Rockets & Space.
    >>>>>
    And also our Telgram Channel.

    #space #spacex #spacexlanding #spacestation #spacefacts #spaceflight #spacecraft #spacexrocketlaunch #spacexfalconheavy #falcon9 #falcon9launch #falcon9landing #astronomy #BFR #starship #astrophysics #darkenergy #onlinecourses #onlinecourse #rocketscience #physicsfun #galaxies #physicslove #darkmatter #physics_lab #aerospace #aerospaceengineer #rocketslove

  •  2,112  25  10 hours ago
  • "One day, someone called the Institute and asked to speak to a particular dean. When his secretary said that the dean wasn't available, the caller hesitantly asked for Einstein's home address. That was not possible to give out, he was informed. The caller's voice then dropped to a whisper. 'Please don't tell anybody,' he said, 'but I am Dr. Einstein, I'm on my way home, and I've forgotten where my house is.'"

The sources of this hilarious story about Einstein substantiatesstory are the biographies "Einstein: His Life and Universe" by Walter Isaacson and Ronald Clark's "Einstein: The Life and Times.

Photo: Princeton University Archive

If you enjoy these my posts, or even inspiration anyway, please LIKE posts and FOLLOW me. 😊

#einstein #physics_lab #physics #photonics #popularscience #chemistry #math #insta #instamood #instastory #house #where #physicsfun
  • "One day, someone called the Institute and asked to speak to a particular dean. When his secretary said that the dean wasn't available, the caller hesitantly asked for Einstein's home address. That was not possible to give out, he was informed. The caller's voice then dropped to a whisper. 'Please don't tell anybody,' he said, 'but I am Dr. Einstein, I'm on my way home, and I've forgotten where my house is.'"

    The sources of this hilarious story about Einstein substantiatesstory are the biographies "Einstein: His Life and Universe" by Walter Isaacson and Ronald Clark's "Einstein: The Life and Times.

    Photo: Princeton University Archive

    If you enjoy these my posts, or even inspiration anyway, please LIKE posts and FOLLOW me. 😊

    #einstein #physics_lab #physics #photonics #popularscience #chemistry #math #insta #instamood #instastory #house #where #physicsfun

  •  15  0  17 hours ago
  • Starhopper: A small hop towards a big dream.

Starship Development Series, Part 1

The integrated system testing of a proof of concept for Starship began in March 2019, with the addition of a single Raptor rocket engine to a reduced-height prototype, nicknamed Starhopper—similar to Grasshopper, an equivalent prototype of the Falcon 9 reusable booster. Starhopper was used from April through August 2019 for static testing and low-altitude, low-velocity flight testing of vertical launches and landings.

The usage of Stainless steel material instead of carbon fiber composites is one of the many counter-intuitive design steps taken in the entire Startship program.

Stainless steel has two main crystalline structures - martensitic (400 series) & austenitic (300 series). From the point of cryogenic applications, the 300 series offers much better strength and tougness than the other available options. In Elon's words, "Most steels, as you get to cryogenic temperatures, become very brittle. That’s true of most steels, but not of stainless steel that has a high chrome-nickel content. That actually increases in strength, and ductility is still very high. So you have, like, 12% to 18% ductility at, say, 72 degrees Kelvin (-330 degrees Fahrenheit). Very ductile, very tough. No fracture issues. "

To be continued …

Was it informative? Any questions? Let us know in comments.
~~
Check link in bio for 👇👇
📚 📚 📚 📚
Free ebook on Falcon 9.
🚀 🚀 🚀 🚀
Fundamentals of Rocket Science, 8h video series.
♠️ ♦️ ♠️ ♦️
Playing cards on Rocket Science.
📧 📧 📧 📧
Free Weekly Email newsletters on Rockets & Space.
>>>>>
And also our Telgram Channel.

#space #spacex #spacexlanding #spacestation #spacefacts #spaceflight #spacecraft #spacexrocketlaunch #spacexfalconheavy #falcon9 #falcon9launch #falcon9landing #astronomy #BFR #starship #astrophysics #darkenergy #onlinecourses #onlinecourse #rocketscience #physicsfun #galaxies #physicslove #darkmatter #physics_lab #aerospace #aerospaceengineer #rocketslove
  • Starhopper: A small hop towards a big dream.

    Starship Development Series, Part 1

    The integrated system testing of a proof of concept for Starship began in March 2019, with the addition of a single Raptor rocket engine to a reduced-height prototype, nicknamed Starhopper—similar to Grasshopper, an equivalent prototype of the Falcon 9 reusable booster. Starhopper was used from April through August 2019 for static testing and low-altitude, low-velocity flight testing of vertical launches and landings.

    The usage of Stainless steel material instead of carbon fiber composites is one of the many counter-intuitive design steps taken in the entire Startship program.

    Stainless steel has two main crystalline structures - martensitic (400 series) & austenitic (300 series). From the point of cryogenic applications, the 300 series offers much better strength and tougness than the other available options. In Elon's words, "Most steels, as you get to cryogenic temperatures, become very brittle. That’s true of most steels, but not of stainless steel that has a high chrome-nickel content. That actually increases in strength, and ductility is still very high. So you have, like, 12% to 18% ductility at, say, 72 degrees Kelvin (-330 degrees Fahrenheit). Very ductile, very tough. No fracture issues. "

    To be continued …

    Was it informative? Any questions? Let us know in comments.
    ~~
    Check link in bio for 👇👇
    📚 📚 📚 📚
    Free ebook on Falcon 9.
    🚀 🚀 🚀 🚀
    Fundamentals of Rocket Science, 8h video series.
    ♠️ ♦️ ♠️ ♦️
    Playing cards on Rocket Science.
    📧 📧 📧 📧
    Free Weekly Email newsletters on Rockets & Space.
    >>>>>
    And also our Telgram Channel.

    #space #spacex #spacexlanding #spacestation #spacefacts #spaceflight #spacecraft #spacexrocketlaunch #spacexfalconheavy #falcon9 #falcon9launch #falcon9landing #astronomy #BFR #starship #astrophysics #darkenergy #onlinecourses #onlinecourse #rocketscience #physicsfun #galaxies #physicslove #darkmatter #physics_lab #aerospace #aerospaceengineer #rocketslove

  •  2,208  22  4 August, 2020
  • Physics 1 
___________________________________________
• Topic: Surface temperature of the sun Betelgeuse 🌞
___________________________________________
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•🎥YOUTUBE: Physics tutor genius learning 
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#physicshomework #physicshomeworkhelp #physics_lab #physicsmemes #physicsclasses #physicsclass #mcatprep #mechanicalengineering #physics #physicsteacher #electromagnetism #physicsproblems #calculus1 #physicsfacts #mathhomework #calculusproblems #Physik #physicsnotes #Física #物理 #medicalphysics  #physicstutor #physicsquiz #physicsstudent  #calculusnotes #Physicsexam  #chemistry #mathmemes #physicslove #Einstein
  • Physics 1
    ___________________________________________
    • Topic: Surface temperature of the sun Betelgeuse 🌞
    ___________________________________________
    • I will post a video on my YOUTUBE channel.
    ___________________________________________
    •🎥YOUTUBE: Physics tutor genius learning
    ___________________________________________________________
    •SUBSCRIBE and COMMENT if this problem is helpful for you 🤓👍🏾 ___________________________________________________________
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  •  201  0  4 August, 2020
  • CLASSICAL MECHANICS 
___________________________________________
• Topic: Lagrangian of a spherical pendulum ⚛️. Using SPHERICAL  COORDINATES 
___________________________________________ • I will post a video on my YOUTUBE channel. 
___________________________________________
•🎥YOUTUBE: Physics tutor genius learning 
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•SUBSCRIBE and COMMENT if this problem is helpful for you 🤓👍🏾 ___________________________________________________________
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@clo__007 
@clo__007 
@clo__007 
#physicshomework #physicshomeworkhelp #physics_lab #physicsmemes #physicsclasses #physicsclass #mcatprep #mechanicalengineering #physics #physicsteacher #physicsproblems #calculus1 #physicsfacts  #calculusproblems #Physik #physicsnotes #Física #物理 #medicalphysics  #physicstutor #physicsquiz #physicsstudent  #calculusnotes #Physicsexam  #chemistrynotes #maths #physicslove #physicsonly  #physicsmeme  #physicshometutor
  • CLASSICAL MECHANICS
    ___________________________________________
    • Topic: Lagrangian of a spherical pendulum ⚛️. Using SPHERICAL COORDINATES
    ___________________________________________ • I will post a video on my YOUTUBE channel.
    ___________________________________________
    •🎥YOUTUBE: Physics tutor genius learning
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    •SUBSCRIBE and COMMENT if this problem is helpful for you 🤓👍🏾 ___________________________________________________________
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  •  717  1  4 August, 2020
  • CLASSICAL MECHANICS 
___________________________________________
• Topic: RATE of CHANGE part ( 1/2 )
___________________________________________
• I will post a video on my YOUTUBE channel. 
___________________________________________
•🎥YOUTUBE: Physics tutor genius learning 
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@clo__007 
@clo__007 
@clo__007 
#physicshomework #physicshomeworkhelp #physics_lab #physicsmemes #physicsclasses #physicsclass #mcatprep #mechanicalengineering #physics #physicsteacher #electromagnetism #physicsproblems #calculus1 #physicsfacts #mathhomework #calculusproblems #Physik #physicsnotes #Física #物理 #medicalphysics  #physicstutor #physicsquiz #physicsstudent  #calculusnotes #Physicsexam  #chemistry #mathmemes #physicslove #Einstein
  • CLASSICAL MECHANICS
    ___________________________________________
    • Topic: RATE of CHANGE part ( 1/2 )
    ___________________________________________
    • I will post a video on my YOUTUBE channel.
    ___________________________________________
    •🎥YOUTUBE: Physics tutor genius learning
    ___________________________________________________________
    •SUBSCRIBE and COMMENT if this problem is helpful for you 🤓👍🏾 ___________________________________________________________
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    @clo__007
    @clo__007
    @clo__007
    #physicshomework #physicshomeworkhelp #physics_lab #physicsmemes #physicsclasses #physicsclass #mcatprep #mechanicalengineering #physics #physicsteacher #electromagnetism #physicsproblems #calculus1 #physicsfacts #mathhomework #calculusproblems #Physik #physicsnotes #Física #物理 #medicalphysics #physicstutor #physicsquiz #physicsstudent #calculusnotes #Physicsexam #chemistry #mathmemes #physicslove #Einstein

  •  385  2  4 August, 2020
  • CLASSICAL MECHANICS 
___________________________________________
• Topic: RATE of CHANGE part ( 2/2 )
___________________________________________
• I will post a video on my YOUTUBE channel. 
___________________________________________
•🎥YOUTUBE: Physics tutor genius learning 
___________________________________________________________
•SUBSCRIBE and COMMENT if this problem is helpful for you 🤓👍🏾 ___________________________________________________________
🔴 LINK IN MY BIO 🔴
___________________________________________________________ 👨🏽‍🏫Questions? Follow and dm⬇️
@clo__007 
@clo__007 
@clo__007 
#physicshomework #physicshomeworkhelp #physics_lab #physicsmemes #physicsclasses #physicsclass #mcatprep #mechanicalengineering #physics #physicsteacher #electromagnetism #physicsproblems #calculus1 #physicsfacts #mathhomework #calculusproblems #Physik #physicsnotes #Física #物理 #medicalphysics  #physicstutor #physicsquiz #physicsstudent  #calculusnotes #Physicsexam  #chemistry #mathmemes #physicslove #Einstein
  • CLASSICAL MECHANICS
    ___________________________________________
    • Topic: RATE of CHANGE part ( 2/2 )
    ___________________________________________
    • I will post a video on my YOUTUBE channel.
    ___________________________________________
    •🎥YOUTUBE: Physics tutor genius learning
    ___________________________________________________________
    •SUBSCRIBE and COMMENT if this problem is helpful for you 🤓👍🏾 ___________________________________________________________
    🔴 LINK IN MY BIO 🔴
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    @clo__007
    @clo__007
    @clo__007
    #physicshomework #physicshomeworkhelp #physics_lab #physicsmemes #physicsclasses #physicsclass #mcatprep #mechanicalengineering #physics #physicsteacher #electromagnetism #physicsproblems #calculus1 #physicsfacts #mathhomework #calculusproblems #Physik #physicsnotes #Física #物理 #medicalphysics #physicstutor #physicsquiz #physicsstudent #calculusnotes #Physicsexam #chemistry #mathmemes #physicslove #Einstein

  •  249  0  4 August, 2020
  • [ONLINE TUTORING AVAILABLE]⁠
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Struggling with Aerospace Engineering or Physics courses and need extra help? Stress no more! Contact tutor Guadalupe for help today 🚀⁠
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  • [ONLINE TUTORING AVAILABLE]⁠

    Struggling with Aerospace Engineering or Physics courses and need extra help? Stress no more! Contact tutor Guadalupe for help today 🚀⁠
    ⁠⁠...⁠
    Check out her profile for more details. Link in bio☝️⁠⁠
    ...⁠
    Education 🎓 #universityofcaliforniairvine
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    Sign up as a student is FREE 😮⁠
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  •  14  1  3 August, 2020
  • 🔬Tag Your Friends Who Loves Physics & Science Experiments🔬
💦How to reduce surface tension?!💦
This simple experiment shows the answer.
At the beginning the small aluminium sheet floats on the surface of clear water, even though it is considerably
denser, heavier than water. But it reduces the surface of water so it reduces the surface energy.
This is why it does not sink into the water this phenomenon is called the surface tension of water (and other liquids). But if we put some material into the water that tends to attach to the surface like a few drops of soap solution it reduces the surface tension and the aluminium piece sinks.
.
.
Credits👉🏻 @science_here check out their page♥️
Rate this work 1-10😁
Comment below👇🏻👇🏻and tag others also😁
.
.
➖➖➖➖➖➖➖➖➖➖
Follow us👉🏻 @techtips0802 
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📷All rights and credits reserved to the respective owner(s).
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  • 🔬Tag Your Friends Who Loves Physics & Science Experiments🔬
    💦How to reduce surface tension?!💦
    This simple experiment shows the answer.
    At the beginning the small aluminium sheet floats on the surface of clear water, even though it is considerably
    denser, heavier than water. But it reduces the surface of water so it reduces the surface energy.
    This is why it does not sink into the water this phenomenon is called the surface tension of water (and other liquids). But if we put some material into the water that tends to attach to the surface like a few drops of soap solution it reduces the surface tension and the aluminium piece sinks.
    .
    .
    Credits👉🏻 @science_here check out their page♥️
    Rate this work 1-10😁
    Comment below👇🏻👇🏻and tag others also😁
    .
    .
    ➖➖➖➖➖➖➖➖➖➖
    Follow us👉🏻 @techtips0802
    Follow us👉🏻 @techtips0802
    ➖➖➖➖➖➖➖➖➖➖
    📷All rights and credits reserved to the respective owner(s).
    〰️〰️〰️〰️〰️〰️〰️〰️〰️〰️〰️〰️〰️〰️〰️〰️〰️〰️〰️
    #scienceiscool #scienceisawesome #sciencevideos #scienceteacher #scienceexperiments #sciencehumor #sciencelovers #sciencestudents #sciencefacts #sciencefact #scienceproject #sciencefun #sciencevideo #physicslover #physicsfacts #physicsexperiment #scienceexperiment #physicsfun #physicslife #physicsclass #physics_lab #physics #physicsisfun
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  •  255  14  3 August, 2020
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Education 🎓 #unibirmingham⁠
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  • [ONLINE TUTORING AVAILABLE]⁠

    Struggling with Math, Physics or Statistics courses and need extra help? Stress no more! Contact tutor Suhail for help today 🚀⁠
    ⁠⁠...⁠
    Check out his profile for more details. Link in bio☝️⁠⁠
    ...⁠
    Education 🎓 #unibirmingham
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  •  10  1  3 August, 2020
  • A space suit is a garment worn to keep a human alive in the harsh environment of outer space, vacuum and temperature extremes. Space suits are often worn inside spacecraft as a safety precaution in case of loss of cabin pressure, and are necessary for extravehicular activity (EVA), work done outside spacecraft.

Three types of space suits exist for different purposes -

IVA (intravehicular activity), EVA (extravehicular activity), and IEVA (intra/extravehicular activity).

IVA suits are meant to be worn inside a pressurized spacecraft, and are therefore lighter and more comfortable.

IEVA suits are meant for use inside and outside the spacecraft, such as the Gemini G4C suit. They include more protection from the harsh conditions of space, such as protection from micrometeorites and extreme temperature change.

EVA suits, such as the EMU, are used outside spacecraft, for either planetary exploration or spacewalks. They must protect the wearer against all conditions of space, as well as provide mobility and functionality.

#spacexlaunch #spacex #spacexlanding #spacestation #spacefacts #spaceflight #spacecraft #spacexrocketlaunch #spacexfalconheavy #falcon9 #falcon9launch #falcon9landing #falconheavy #BFR #starship #droneship #merlineengine #onlinecourses #onlinecourse #rocketscience #physicsfun #physicsclass #physicslove #dragon #physics_lab #aerospace #aerospaceengineer #rocketslove
  • A space suit is a garment worn to keep a human alive in the harsh environment of outer space, vacuum and temperature extremes. Space suits are often worn inside spacecraft as a safety precaution in case of loss of cabin pressure, and are necessary for extravehicular activity (EVA), work done outside spacecraft.

    Three types of space suits exist for different purposes -

    IVA (intravehicular activity), EVA (extravehicular activity), and IEVA (intra/extravehicular activity).

    IVA suits are meant to be worn inside a pressurized spacecraft, and are therefore lighter and more comfortable.

    IEVA suits are meant for use inside and outside the spacecraft, such as the Gemini G4C suit. They include more protection from the harsh conditions of space, such as protection from micrometeorites and extreme temperature change.

    EVA suits, such as the EMU, are used outside spacecraft, for either planetary exploration or spacewalks. They must protect the wearer against all conditions of space, as well as provide mobility and functionality.

    #spacexlaunch #spacex #spacexlanding #spacestation #spacefacts #spaceflight #spacecraft #spacexrocketlaunch #spacexfalconheavy #falcon9 #falcon9launch #falcon9landing #falconheavy #BFR #starship #droneship #merlineengine #onlinecourses #onlinecourse #rocketscience #physicsfun #physicsclass #physicslove #dragon #physics_lab #aerospace #aerospaceengineer #rocketslove

  •  64  0  3 August, 2020
  • 👉Click Electron👈
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📝The researchers used powerful Laser flashes to irradiate thin films of crystalline materials. These laser pulses drove crystal electrons into a fast wiggling motion. As the electrons bounced off the surrounding electrons, they emitted radiation in the extreme ultraviolet part of the spectrum. By analyzing the properties of this radiation, the researchers composed pictures that illustrate how the electron cloud is distributed among atoms in the crystal lattice of solids with a resolution of a few tens of picometers, which are billionths of a millimeter. The experiments pave the way for a new class of laser-based microscopes that could allow physicists, chemists, and material scientists to peer into the details of the microcosm with unprecedented resolution and to understand and eventually control the chemical and the electronic properties of materials.📝
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  • 👉Click Electron👈
    .
    📝The researchers used powerful Laser flashes to irradiate thin films of crystalline materials. These laser pulses drove crystal electrons into a fast wiggling motion. As the electrons bounced off the surrounding electrons, they emitted radiation in the extreme ultraviolet part of the spectrum. By analyzing the properties of this radiation, the researchers composed pictures that illustrate how the electron cloud is distributed among atoms in the crystal lattice of solids with a resolution of a few tens of picometers, which are billionths of a millimeter. The experiments pave the way for a new class of laser-based microscopes that could allow physicists, chemists, and material scientists to peer into the details of the microcosm with unprecedented resolution and to understand and eventually control the chemical and the electronic properties of materials.📝
    .
    .
    ❤️Like Comment Share❤️
    .
    🎯Follow @basik_physik for more🎆
    🎯Follow @basik_physik for more🎆
    🎯Follow @basik_physik for more🎆
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    #physics #particlephysics #electrons #theoreticalphysics #nuclearphysics #cern
    #physicslover #láser #gravitationalwaves #nuclearreactor #experimentalphysics #picoscope
    #space #universe #einstein #physicsfun #physics_lab #sciencelovers #astrophile #physicsnotes #quantumphysics #basik_physik

  •  372  6  3 August, 2020
  • Lol UY Scuti 😅😂 *not to scale*
𝗙𝗼𝗹𝗹𝗼𝘄 @the_science_fact 𝗳𝗼𝗿 𝗺𝗼𝗿𝗲.
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  • Lol UY Scuti 😅😂 *not to scale*
    𝗙𝗼𝗹𝗹𝗼𝘄 @the_science_fact 𝗳𝗼𝗿 𝗺𝗼𝗿𝗲.
    If you like this post, surely share it.
    Kindly like, comment and share this Post.

    Double Tap ♥️ for more
    ✓Tag your friends to tell this 👥
    ✓Turn On Notification 🔊
    ✓RePost if you love 🔄
    ✓share this post💗
    ✓save it for later •For more interesting posts,
    >>>Follow now 👉@the_science_fact
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    #the_science_fact
    #sciencefacts #scienceteacher #hubble #spacefacts #physicsjokes #physicslovers  #spaceporn   #physicsmemes  #physicsclass  #physicsstudent #physicslab #physicsmajor #physicsfun @the_science_fact #chemistrystudent #einsteinmemes #physicsgirl #physicsfun #astronomyfacts #physics_lab #physicsteacher #physicsstudent  #physicsnotes #spacetravel #sciencestudent #timetraveler #scienceporn #cosmology #astrophysics #astronomy #astrophile

  •  515  4  3 August, 2020

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