Metals are used in many products because of the characteristic properties that most metals have. which product requires the high luster of metals in order to work?

Metals are used in many products because of the characteristic properties that most metals have. The product that requires the high luster of metals is a mirror. Luster is used to describe something that reflect light off a surface. Metals are known to have the quality of reflecting light from its surface therefore it is a good material for the said product.

Most smaller stars don't have a radiative zone.