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Author Question: Almost all stars on the main sequence range from 0.1 to 15 solar radii. Indicate whether the ... (Read 119 times)

crazycityslicker

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on: Jul 27, 2018
Almost all stars on the main sequence range from 0.1 to 15 solar radii.
 
  Indicate whether the statement is true or false

Question 2

What is meant by the event horizon?
 
  What will be an ideal response?


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zoeyesther

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Reply #1 on: Jul 27, 2018
Answer to Question 1

TRUE

Answer to Question 2

When a mass has contracted to a certain radius, the Schwartzschild radius, gravity at its surface is so high that the escape velocity is the speed of light. The event horizon is the imaginary surface of a sphere with this radius. Even if the mass continues shrinking, anything passing inside this radius cannot escape the pull of gravity.


crazycityslicker

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Reply #2 on: Jul 27, 2018
Thanks


zoeyesther

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Reply #3 on: Jul 27, 2018
Welcome :)


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