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