Question

when a em waves strike a surface they exert............on it.​

Answer 1

Answer:

force

Explanation:

Force is defined as capable of changing the direction or can deform the body.

It can also cause change in shape and size when some force is applied on the body. It is that influenced on the body which cause change in motion or stops the  motion of a body.

Thus whenever a wave strikes a surface, they exerts a force on it.