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Physics Test: Electromagnetic Waves
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36 Terms
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Electromagnetic waves
a wave that is partly magnetic and partly electric
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Radio
Largest electromagnetic waves (size of buildings-humans)
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Microwave
Second largest electromagnetic waves (size of honey bee)
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Infrared
Third largest electromagnetic wave (size of a pinpoint)
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Visible light
Middle of the electromagnetic spectrum (roygbiv)
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Ultraviolet
Third smallest electromagnetic wave (size of molecules)
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X-ray
Second smallest electromagnetic wave (size of atoms)
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Gamma ray
Smallest electromagnetic wave (size of atomic nuclei)
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Radiation
emitting electromagnetic waves
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low
Radio waves have high or low frequency?
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high
Gamma ray waves have high or low frequency
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3 x 10^8 m/s
What is the speed of light?
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700 nm - 400 nm
Range of visible light? (nanometers)
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white
our eyes interpretation of every color wave at once
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black
no light waves, everything is absorbed
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red, green, blue
three primary colors
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yellow, cyan, magenta
three secondary colors
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Cornea
part of eye that lets light through, protective layer
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lens
part of eye that focuses the image
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retina
part of the eye that the image is focused on, contains rods and cones
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optic nerve
bundle of nerves that connects to the brain
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rods
cells on outside of retina that see bright and dark
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cones
cells on the center of the retina that react to colors, three types (red green, blue)
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color-blindness
missing or damaged cones leads to...
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yellow
Red-high, Green-high, B- none
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cyan
Red-low, Green-mid, Blue-mid
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Reflection
light hits a surfaces and bounces off, the incident ray and second ray have the same angle
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Refraction
the medium changes so the direction of the wave changes, light "curves"
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Diffraction
bending of waves around small obstacles and the spreading out of waves past small openings
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Polarization
reflection of light of non-metallic surfaces, results in removal of light waves that aren't a certain direction
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Blind spot
The optic nerve in your retina causes a...
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medium
the substance waves are traveling through
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Spectrum
range of things
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Velocity = frequency x wavelength
Speed of a wave formula
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because blue waves are small but our eye picks them up more than violet waves.
Why is sky blue and not violet?
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color combinations
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