Even if a probe were in a stable orbit near a black hole, we ...

[WWatsford]

Even if a probe were in a stable orbit near a black hole, we would still observe its signals redshifted by the gravitational field of the black hole.
 
  Indicate whether the statement is true or false

Question 2

Star A is identical to Star B, except that Star A is twice as far from us as Star B. Therefore, ________.
 
  A) both stars have the same luminosity, but the apparent brightness of Star A is four times that of
  B) both stars have the same luminosity, but the apparent brightness of Star B is four times that of
  C) both stars have the same apparent brightness, but the luminosity of Star B is four times that of
  D) both stars have the same luminosity, but the apparent brightness of Star B is twice that of Star A

[aham8f]

Answer to Question 1

TRUE

Answer to Question 2

B

[WWatsford]

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