"What causes refraction? 1. The existence of different colors of light 2. None of these 3. The speed of light being higher than c in some media 4. The difference in the speed of light in different transparent media 5. Reflection"

kinetic

i'm so sorry if this is wrong i'm only in 6th grade xd

the working equation for the angular size is the product of the physical size and 360 degrees divided by the product of two pi and distance from earth. the minimum size would be 0.559 degrees while the maximum size would be 0.49 degrees. 

do you have a formula possibly

d) physical means can be used to separate the components of air.