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40 terms

Waves Vocabulary

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Electromagnetic Wave
Consists of changing electric and magnetic fields in space.
Longitudinal Wave
The particles of the wave move parallel to the direction that the wave is moving.
Mechanical Wave
Waves that can only travel through a medium.
Crest
The highest points of a transverse wave.
Medium
The matter through which a wave can travel.
Transverse Wave
The particles move perpendicular to the direction that the wave is traveling.
Trough
The lowest points of a transverse wave.
Compression
Place where particles of a longitudinal wave are close together.
Rarefaction
Place where particles of a longitudinal wave are farther apart.
Wavelength
A measurement from one crest to the next on a transverse wave, or from compression to compression on a longitudinal wave.
Amplitude
Half of the height from one trough to the next crest.
Frequency
The amount of waves that pass a certain point in a given period of time; measured in hertz.
X-Ray
Allows doctor's to easily look through skin to examine bones
Microwaves
Causes water molecules to vibrate and cooks food
Gamma Rays
Used by an oncologist (a physician that studies and treats cancer) Highest frequency.
Radio Waves
TV broadcast signal
Infrared Waves
Lamp used to warm a baby chick
Ultraviolet Waves
Can cause sunburn from a tanning bed
energy
the ability to do work; usable heat or power
force/disturbance
strength or energy exerted; resistance
vacuum
empty space
reflection
the bouncing back of waves as they hit a medium
refraction
the bending or turning of a wave when it bounces from one medium to another with a different density
diffraction
the bending or turning of a wave when it encounters an obstacle such as an edge or hole
wave
a traveling disturbance that carries energy from one place to another
absorb
to take in
transmit
to cause to pass through space or a medium
electromagnetic spectrum
the entire range of electromagnetic radiation arranged by amount of energy
visible spectrum
the portion of the electromagnetic spectrum that can be seen with the human eye
sound
a type of wave motion that starts out as the vibration of a medium
retina
the light-sensitive membrane that lines the back of the eyeball connected to the brain by the optic nerve
cornea
the tough protective covering of the eye that protects the eyeball
lens
transparent structure behind the eye that focuses light on the retina
pupil
the opening in the center of the eye that allows light to enter the eye
optic nerve
the nerve that carries messages to the brain from the retina
rods
rod-shaped cells in the retina which allow for seeing in dim light
cones
cone-shaped cells in the retina which allow for seeing colors and in bright light
vibrations
a rapid back and forth motion
pitch
the highness or lowness of a sound
intensity
extreme strength or force