Some light energy can be seen and some cannot be seen with the unaided eye.

There is one form of light energy that is very good at exciting water molecules, but it is invisible to human eyes. If enough of this type of light is shot at water, the water will boil. This application of light energy is so useful that most American households have a device that uses it to cook food.

What type of light energy is this?
A.
heat energy
B.
natural gas energy
C.
microwave energy
D.
electric energy