What does radiant energy turn into?

Answer 1

It can be absorbed and become thermal energy such as by a dark rough brick laying in the sun.

It can be absorbed and radiated at a lower frequency (longer wavelength).

It can be reflected by a very shiny object and thus not change.

Answer 2

Radiant energy can be converted into other forms of energy such as heat, light, or electrical energy depending on the type of material it interacts with.