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Across
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A crest is the point on a wave with the maximum value or upward displacement within a cycle.
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defined as the bending of light around the corners of an obstacle or aperture into the region of geometrical shadow of the obstacle
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is the change in frequency or wavelength of a wave for an observer who is moving relative to the wave source.
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the number of crests of a wave that move past a given point in a given unit of time
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a wave produced by the acceleration of an electric charge
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the time needed for one complete cycle of vibration to pass a given point.
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A mechanical wave is a wave that is an oscillation of matter, and therefore transfers energy through a medium.
Down
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a wave that move past a given point in a given unit of time
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a wave in which the direction of displacement is perpendicular to the direction of propagation, as a surface wave of water
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Reflection is the change in direction of a wavefront at an interface between two different media
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A photon is a type of elementary particle, the quantum of the electromagnetic field including electromagnetic radiation such as light
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A substance that makes possible the transfer of energy from one location to another