What is the function and principle of reflector?

There are reflective plates for photography and reflective plates for photography, which have different concepts and use effects;

Photography-The camera shoots a still picture, and only when the light is insufficient, the reflector is used to reflect a certain range of light only to people or objects, so that the shooting effect will not encounter weak light conditions such as mosaic, virtual focus and darkness. The reflector is also made of purple-gold wave or mirror type.

Photography-When shooting movies and TV series (even a DV is used now), reflectors are often used, and others should be used together with soft cloth and lighting. Because the person or thing being photographed is dynamic, the reflector chosen is not the mirror for photography, but Miboluo (with clean foam board), so that the shooting effect will not be obviously reflected by the reflector, and it looks natural because of Miboluo.

Why do you want to combine light with soft cloth? I need another explanation for this problem! But your problem is "reflector"!