# Shared Flashcard Set

## Details

SCIENCE
Light Energy Vocab
24
Science
03/26/2012

Term
 TRANSVERSE WAVE
Definition
 waves in which the particles vibrate perpendicular to the direction of the wave, or the energies run perpendicular to each other
Term
 ELECTROMAGNETIC SPECTRUM (EM)
Definition
 energy made up of a combination of magnetism and electricity; it is a transverse wave because the two energies run perpendicular (at right angles) to one another
Term
 REST POSITION
Definition
 where the particles stay in there is not wave (no energy making them move)
Term
 CREST
Definition
 the highest point of a transverse wave
Term
 TROUGH
Definition
 the lowest point of a transverse wave
Term
 AMPLITUDE
Definition
 the distance bestween the rest position in a wave, and the crest
Term
 WAVELENGTH
Definition
 the distance between two corresponding points on adjacent (side by side) waves
Term
 FREQUENCY
Definition
 how many waves go through a point in one second; measured in Hertz
Term
 WAVE SPEED
Definition
 how fast a wave goes; equals wavelength times frequency
Term
Definition
 the lowest frequency EM wave
Term
 MICROWAVES
Definition
 next lowest frequency wave after radio waves; used to cook food and is produced and picked up by your cell phone
Term
 INFRARED WAVES
Definition
 3rd lowest frequency wave; used to kill bacteria and for night vision goggles
Term
 VISIBLE LIGHT WAVES
Definition
 the wave in the middle of the EM spectrum; this is the light we can see
Term
 ULTRAVIOLET WAVES
Definition
 (abbreviated UV waves); higher frequency than visible light waves, these are used in tanning beds, and exposure over time can cause skin cancer
Term
 X-RAYS
Definition
 even higher frequency than UV waves, these can help doctors diagnose broken bones, but too much exposure has been proven to cause cancer
Term
 GAMMA RAYS
Definition
 highest frequency EM wave, these can kill cancer cells, but also kill healthy cells; atomic bombs produce them
Term
 OPAQUE
Definition
 materials that don't allow light to pass through so we can't see through them; most things we see are opaque, like doors, walls, and you!
Term
 TRANSLUCENT
Definition
 materials that allos SOME light to pass through, but not all of it, so we can sort of see through it, but the view is changed; wax paper is translucent
Term
 TRANSPARENT
Definition
 materials that allow most, or all, the light to pass through, so we can see through it; window panes and water are transparent
Term
 TRANSMISSION
Definition
 when light energy passes through matter, light passes through transparent material
Term
 ABSORPTION
Definition
 when light energy is taken in matter and stops there
Term
 REFLECTION
Definition
 when energy bounces back after hitting matter
Term
 CONCAVE LENS
Definition
 a lens that is thinner in the middle than at the edges
Term
 CONVEX LENS
Definition
 a lens that is thicker in the middle than at the edges
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