A) heat B) the atmosphere C) a field D) a material medium
A) a vacuum B) the high energy of the Sun C) artificial lights D) the energy of distant stars
A) speed of EM waves in a vacuum B) energy that moves as EM waves C) motion of a medium caused by EM waves D) conversion of EM waves into kinetic energy
A) depends on the source of the waves B) always remains constant C) increases as the amount of energy increases D) decreases as the waves spread out
A) convert electromagnetic energy into heat B) pass through the water without interacting with it C) are reflected in many directions D) are refracted
A) microwaves B) ultraviolet light C) radio waves D) x-rays
A) ultraviolet light B) x-rays C) gamma rays D) radio waves
A) microwaves B) ultraviolet light C) radio waves D) x-rays
A) ultraviolet light B) radio waves C) microwaves D) infrared light
A) visible light B) radio waves C) microwaves D) ultraviolet light
A) x-rays B) microwaves C) radio waves D) ultraviolet light
A) ultraviolet light B) microwaves C) x-rays D) radio waves |