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