Light entering a Black Hole and Hawking radiation

  • #1
Superposed_Cat
383
5
Hi all, I was wondering if, when a beam of light is pulled towards a black hole , because it can't accelerate, it is blueshifted? Thanks in advance.
 

Answers and Replies

  • #2
tiny-tim
Science Advisor
Homework Helper
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255
Hi Superposed_Cat! :smile:

If two people with identical flashlights are stationary at the top and bottom of a mountain, shining the flashlights at each other,

the top person will see the light redshifted, and the bottom person will see the light blueshifted.

It's the same for stationary observers near a black hole …

the gravitational effect of a black hole is (outside the event horizon and outside the surface of the star) exactly the same as that of a star of the same mass.
 
  • #3
Superposed_Cat
383
5
Thanks tiny-tim :). Good day fine sir.
 

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