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6 Unit 2

Waves and EM Radiation

TermDefinition
wave an disturbance that transfers energy from place to place
mechanical wave a wave that can only travel through a medium; transverse, longitudinal, and surface waves
medium the matter a wave travel through
transverse wave type of mechanical wave that travels perpendicular (at a right angle) to the direction of the source's motion
amplitude the distance between the highest crest and the resting position
longitudinal wave a mechanical wave that travels in the same direction as the vibrations that produce it
wavelength the from crest to crest or trough to trough of a transverse wave or from compression to compression of a longitudinal wave
frequency the number of times a wave repeats in a given amount of time; measured in a unit called hertz (Hz)
reflection when a wave bounces off a surface and heads in a different direction
refraction the bending of waves through a medium due to a change in speed like from air to water
diffraction the bending or spreading of waves as they move around a barrier or pass through an opening
absorption the energy of a wave is transferred to the material it encounters
electromagnetic spectrum the complete range of electromagnetic waves placed in order of increasing frequency starting with radio waves and ending with gamma rays
transparent a material that transmits most of the light that strikes it like a window pane or plastic wrap
translucent material scatters the light that passes through it; image can be seen through it but it's blurry
opaque a material that reflects or absorbs all of the light that strikes it; anything solid like a wall or door or person
convex a mirror that curves outward or lens that is thicker in the center than at the edges
concave a mirror with a surface that curves inward or a lens that is thinner at the center than at the edges
Created by: muellershauna
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