A) a field B) heat C) a material medium D) the atmosphere
A) a vacuum B) the high energy of the Sun C) artificial lights D) the energy of distant stars
A) motion of a medium caused by EM waves B) energy that moves as EM waves C) speed of EM waves in a vacuum D) conversion of EM waves into kinetic energy
A) always remains constant B) depends on the source of the waves 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) x-rays B) ultraviolet light C) microwaves D) radio waves
A) radio waves B) ultraviolet light C) x-rays D) gamma rays
A) microwaves B) radio waves C) ultraviolet light D) x-rays
A) infrared light B) ultraviolet light C) microwaves D) radio waves
A) visible light B) microwaves C) ultraviolet light D) radio waves
A) radio waves B) x-rays C) microwaves D) ultraviolet light
A) x-rays B) radio waves C) microwaves D) ultraviolet light |