the causes
Mars does not emit its own light. Rather it reflects sunlight that falls on it.
Red giant stars emit less light per square meter of surface area than smaller, hotter stars, but their larger size means they have a larger surface area from which to emit light, so they emit more light overall.
Red giant stars emit less light per square meter of surface area than smaller, hotter stars, but their larger size means they have a larger surface area from which to emit light, so they emit more light overall.
It can be with the light it reflects from the sun, but not over long distances. Mars does not emit light except in the very long wavelengths (infra red). It is non-luminous. It is only visible because of the light it reflects, as the first answer states.
Light bulbs emit light.
Technetium doesn't emit light.
Yes galaxies emit light
bulbs emit light
You think probable to an ultraviolet lamp.
The Earth does not emit light, it like the moon reflects light
Mars is red because the atmosphere scatters light in a way that causes the light to appear red, and because the surface is covered in red dust