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