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Wave Test Study Guide
Terms in this set (37)
What are the units for frequency and wavelength?
Herts and any unit of distance.
How are speed, wavelength, and frequency related?
Speed = wavelength x frequency.
What are the three shaped of waves?
transverse, longitudinal, and surface
How does a transverse wave move?
S with a perpendicular motion like the motion of a snake
How does a longitudinal wave move?
compression and rarefaction and goes in the direction it is aimed (like sound)
How does a surface wave move?
surface waves roll (like ocean waves)
What are the 7 different kinds of EM waves
Radio, Microwave, Infrared, Visible, Ultraviolet, X Ray, Gamma
What is the use of a radio waves?
transmits television and radio programs.
What is the use of a microwave?
to cook food and is found in your phone
What is the use of infrared waves?
felt as heat and is found in tv controller.
What is the use of visible light?
What is the use of ultraviolet waves?
causes the body to produce vitamin D
What is the use of x-rays?
used in hospitals to produce photographs of bones which can be checked for breaks or fractures.
What is the use of gamma rays?
kill cancer cells, to sterilise medical equipment and in radioactive tracers.
What are the colors of visible light?
Red, Orange, Yellow, Green, Blue, Indigo, Violet.
What are the 3 primary colors of light?
red, green, and blue
What are the 3 types of seismic waves?
Primary, Secondary, Surface
Does the EM spectrum go in order of low to high or high to low frequency?
low to high
What is the order of of EM spectrum?
radio waves, microwaves, infrared, visible light, ultraviolet rays, x-rays, and gamma rays
Definition of Electromagnetic Waves
travels at the speed of light, does not travel through a medium, has an electric and magnetic component.
Definition of Mechanical Waves
must travel through a medium
Defintion of Frequency
The number of waves that pass a point in a second.
Definition of Wavelength
The distance from one wave crest to the next.
Definition of Amplitude
The distance from the middle of the wave to the crest.
Definition of Crest
The top of the wave
Definition of Trough
The lowest part of the wave
Definition of Interference (positive/constructive and negative/destructive)
adding to or subtracting from a wave
Definition of Infrasound and ultrasound
sound below the human range of hearing and sound above the human range of hearing
Definition of Medium
any material that a mechanical wave travels through (like water or air)
Definition of Doppler Effect
the change in apparent pitch of a wave as it comes towards you or goes away from you
Definition of Sonar
navigation by sound (Sound navigation and ranging)
What speed does light travel at?
300,000 km a sec
Definition of Lasers
Light amplification by stimulated emission of radiation
Definition of Refraction
the bending of light
Definition of Cones
the color receptors in the eye
Definition of Blind spot
When you visual field is obscured because of the optic nerve on the back your eye
Definition of Color blindness and causes
Color blindness is hereditary and keeps you from seeing some colors.
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