How to calculate the size of a Black Hole?

Описание: Do you have an idea of how large the Earth would be if, suddenly, it collapsed into a black hole? The answer is mesmerizing!

In this video, we will discuss of the escape velocity at a position on the event horizon. Then, by playing with the escape velocity formula, we will realize that we can calculate the size of any object that would collapse into a black hole. We will use the Earth as an example, but you will learn how to do this calculation for any object, even your cat!

This video is a teaser of a longer lecture that looks into grand detail at the notion of escape velocity. This longer video should be out in a week or so.
Enjoy!

#physics #blackhole #gravity

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LINK TO FULL VERSION
The full version of the video that focuses on escape video can be seen here:
What is Escape velocity:
   • What is Escape Velocity? (Physics)  

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STRUCTURE OF THE VIDEO
00:00 Introduction.
00:33 What is the event horizon of a black hole ?
00:43 What can escape the event horizon of a black hole ?
01:04 Escape velocity of a black hole.
01:26 Determining the size of a black hole.
01:40 The size of the Earth if it were a black hole.
02:33 Quiz: what would happen to the moon if the Earth became a black hole ?
02:49 Additional thoughts: Is the escape velocity of a black hole really the speed of light?
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MUSIC ALBUM
Physics Made Easy « The soundtracks ». Listen to the it here :
https://edouardreny.bandcamp.com/albu...
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CREDITS:
The script, the illustrations, the music and the video were produced and presented by Edouard Reny, Ph.D. in solid state chemistry and private tutor in Physical Sciences.
Most pictures and images originate from Pixabay.com
Picture of the moon: Richard Ross, freepngimg.com, Creative Commons (CC BY-NC 4.0)
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DO YOU NEED HELP WITH YOUR HIGH SCHOOL PHYSICS?
Edouard provides one-on-one private tuition in Physics (face to face or by Skype). If you wish to know more about this, or contact Edouard, visit his website: https://www.physics-tutor.nl/ or this one (for French speakers: https://www.profdephysique.fr/).
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