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