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