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