Question

Why does the sun look red at sunrise and sunset but not at noon?

1. The sun itself is red at sunrise and sunset, but is yellow at noon; it has nothing to do with the effect of the atmosphere.

2. Red light is easily transmitted through the air since its frequency is the lowest. At noon, sunlight travels through the least amount of atmosphere with little scattering of high-frequency light to the surface.

3. The sun is colder at sunrise and sunset than at noon.

4. Our eyes are more sensitive to the red light at sunrise and sunset than at noon.

5. The temperature at noon is warmer than at sunrise and sunset.

6. Red light is easily scattered through the air since its frequency is the lowest. At noon, sunlight travels through the least amount of atmosphere with little transmission of highfrequency light to the surface.

Answer 1