Explanation:

Heat is a form of energy that can be transferred from one object to another or even created at the expense of the loss of other forms of energy.

Heat energy is also carried by non-visible radiation, particularly infra-red light.

That too can be reflected by mirrors, but they are designed to reflect visible light best. Heat travels through a vacuum by infrared radiation (light with a longer wavelength than the human eye can see).

Heat is a measure of kinetic energy