Question

brown light is made up of the colors red and green. why does a tree trunk look brown?
a. it reflects red and green light.
b. it absorbs red and green light.
c. it transmits red and green light.
d. it reflects all colors of light except red and green.

Explanation:

Objects appear a certain color because they reflect that color of light. Since brown light is made of red and green light, a tree trunk that looks brown must reflect red and green light. Absorbing those colors (Option B) would make it not reflect them (so not brown). Transmitting (Option C) would mean the light passes through, not that it's the color we see. Reflecting all except red and green (Option D) would make it not brown.

Answer:

A. It reflects red and green light.