Reflectors . . . What is that?

There is more to photography than understanding how a camera works. Understanding light, the way it spreads and bounces. Some objects absorb light, others bounce it back in another direction. A reflector is a tool that helps a photographer manipulate the light by providing another surface for the light to bounce off of. Reflectors are inexpensive tools that can make a big impact on your images.

The short answer is dark objects absorb light and light objects reflects light.