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38 Cards in this Set
- Front
- Back
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Wave
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A disturbance that carries energy from one place to another
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Transverse Wave
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angles |
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Compressional (longitudinal) wave |
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Crest
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the highest point of the wave |
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Trough
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the lowest point of the wave |
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wavelength
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the distance between one point on a wave and the exact same point on the next wave. |
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wave properties
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depends on what type of energy makes the wave |
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frequency
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how many waves go past a point in one sec; measured in hertz. the higher the frequency then the more energy in the wave |
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Amplitude
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how far the medium (crests and troughs, or compressions and rarefactions) moves from rest position (the place the medium is when it is not moving.) the more energy a wave carries, the more its amplitude. Amplitude is related to energy by squared. |
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wave speed
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depends on the medium the wave is traveling in. this varies in solids |
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reflection |
- the angle in equals the angle out |
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The law of reflection
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- the angle in equals the angle out |
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refraction
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waves can bend; this happens when a wave enters a low medium and its speed is changing; the amount of bending depends on the medium it is entering. |
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diffraction |
the bending of waves around an object the amount of bending depends on the size of the obstacle and the size of the waves - large obstacle, small wavelength = low diffraction - small obstacle, large wavelength = large diffraction |
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mechanical wave
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must have a medium |
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electromagnetic wave |
can travel without a medium |
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matter |
is NOT carried with a wave |
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rarefaction |
where particles are spread apart
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electromagnetic wave |
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Convex or positive lens |
focus light and can form an image |
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concave or negative lens |
spread light rays |
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Laser |
"Light, Application, by Simulated Emission of Radiation" - Lasers use one wavelength of light so all the crests and trough line up - they do not interfere w/ each other and spread the light out like white light |
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Opaque |
do not allow light to pass through they absorb and reflect it all |
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Translucent |
can be seen through, but not clearly the absorb, reflect, and let the light go through |
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Transparent |
object allows almost all of the light to go through , so they can be seen through clearly |
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Subtractive Color system |
It is mainly used in paints red, yellow, and blue are the primary colors red+yellow=orange | yellow+blue=green| blue+red=purple |
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Additive color system |
used in lights main colors - green, red, and blue that create cyan, magenta, and yellow |
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absorption |
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Transmittance |
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Electromagnetic |
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Radiation |
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Electromagnetic Spectrum |
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Radio Waves |
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Infrared waves |
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visible light |
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ultraviolet |
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x-rays |
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gamma rays |
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