A) a material medium
B) heat
C) a field
D) the atmosphere

A) a vacuum
B) the energy of distant stars
C) artificial lights
D) the high energy of the Sun

A) motion of a medium caused by EM waves
B) energy that moves as EM waves
C) conversion of EM waves into kinetic energy
D) speed of EM waves in a vacuum

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) pass through the water without interacting with it
B) convert electromagnetic energy into heat
C) are reflected in many directions
D) are refracted

A) microwaves
B) ultraviolet light
C) radio waves
D) x-rays

A) radio waves
B) x-rays
C) ultraviolet light
D) gamma rays

A) microwaves
B) ultraviolet light
C) x-rays
D) radio waves

A) ultraviolet light
B) radio waves
C) infrared light
D) microwaves

A) microwaves
B) radio waves
C) ultraviolet light
D) visible light

A) microwaves
B) x-rays
C) ultraviolet light
D) radio waves

A) microwaves
B) x-rays
C) radio waves
D) ultraviolet light