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