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