In Ptolemy's geocentric model, the planet's motion along its ...

[tingc95]

In Ptolemy's geocentric model, the planet's motion along its deferent is all that is needed to understand retrograde motion.
 
  Indicate whether the statement is true or false

Question 2

If the distance between us and a star is doubled, with everything else remaining the same, its luminosity
 
  A) is decreased by a factor of two, and its apparent brightness is decreased by a factor of two.
  B) remains the same, but its apparent brightness is decreased by a factor of four.
  C) is decreased by a factor of four, and its apparent brightness is decreased by a factor of four.
  D) remains the same, but its apparent brightness is decreased by a factor of two.
  E) is decreased by a factor of four, but its apparent brightness remains the same.

[k2629]

Answer to Question 1

FALSE

Answer to Question 2

B

[tingc95]

TYSM

[jamesnevil303]

Excellent