The energy that is transferred through space by electromagnetic waves is called

Radiation

Explanation:

Radiation is the process electromagnetic energy is transferred through space between atoms. Radiation doesn't require any material medium for heat transfer. For example, when the sun gives heat to the earth, the heat travels through space.

waves moving from a fast medium to a slow medium will experience a reflection as light travels more slowly than red light. total internal reflection occurs when the critical angle is.

it is called kinetic energy