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