Different colors of light travel at different speeds in a ...

[Jramos095]

Different colors of light travel at different speeds in a transparent medium. In a vacuum, different colors of light travel at
 
  A) different speeds.
  B) the same speed.
  C) decreased speed.

Question 2

Poke a pinhole in a piece of card and hold it in sunlight and an image of the Sun is cast on the floor. The Sun-image diameter depends on the height of the pinhole above the floor.
 
  Measurements for all heights show the Sun-image diameter is about 1/100 the distance between the pinhole and the floor. This means that
  A) about 100 end-to-end Sun images would fit between the pinhole and the floor.
  B) distance-wise, the Sun is about 100 Suns away from Earth.
  C) both of these
  D) none of the above

[kmb352]

Answer to Question 1

Answer: B

Answer to Question 2

Answer: C

[Jramos095]

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[kmb352]

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