the small portion of the electromagnetic spectrum that the human eye can see (R.O.Y.G. B. I. V.)

a lens where the center of the lens is thicker than the edges, makes objects appear larger

energy from the sun that travels in various wavelengths and frequencies including radio waves, microwaves, infrared waves, visible light, UV light, X-rays and gamma rays

a lens where the center of the lens is thinner than the edges, makes objects appear smaller

to pass through a substance or object without being absorbed

to change in the direction of a wave when it BOUNCES off a surface or object (barrier)

a material or substance that allows ALL light to pass through

radiant energy from the sun

a material or substance that allows SOME light to pass through

a material or substance that allows NO light to pass through

Used in astronomy to calculate how fast stars and galaxies are moving towards or away from Earth; towards = increased wave frequency

away = decreased wave frequency

a place or area where there is no matter (no particles)

the disappearance of a wave into a surface, object, or barrier; adds thermal energy