3. Which of the following are reasons that light appears dimmer at increasing
distances from a light source?
A. Light waves slow down as they travel through a medium.
B. The energy of a light wave is absorbed by the medium as the light
travels through a medium.
C. Light waves spread over more area as a wave travels away from the
light source.
D. The wavelength of a light wave increases as the wave travels away
from the light source.