The sun appears larger at sunset than it does when overhead ...

[jlmhmf]

The sun appears larger at sunset than it does when overhead because of:
  1.Scattering of light.
  2.Dispersion.
  3.Diffraction.
  4.Refraction.
  5.An optical illusion.
  6.None of the above.

Question 2

The Sun appears to be red as it sets because:
  1.Air absorbs red light less than other frequencies (i.e., acts like a red filter).
  2.The sunlight has a red-shift when you're moving fastest away from it.
  3.The Sun cools down to 5000 K each evening.
  4.Light is refracted as it enters the atmosphere.
  5.The Sun dies in a glorious fireball each evening and is reborn each morning.
  6.None of the above.

[Kdiggy]

Answer to Question 1

5

Answer to Question 2

6

[jlmhmf]

Excellent

[triiciiaa]

TYSM