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1. a wave vibrating in the direction of propagation.

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Reflected waves remain in their original medium rather than entering the medium they encounter

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the process by which a beam of light or other system of waves is spread out as a result of passing through a narrow aperture or across an edge, typically accompanied by interference between the wave forms produced.

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A substance, such as agar, in which bacteria or other microorganisms are grown for scientific purposes

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1. a wave vibrating at right angles to the direction of its propagation.

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A mechanical wave is a wave that is an oscillation of matter, and therefore transfers energy through a medium.

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other periodic motion of a rigid or elastic body or medium forced from a position or state of equilibrium.

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A trough is the opposite of a crest, so minimum or lowest point in cycle define.

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A crest is the point on a wave with the maximum value or upward displacement within a cycle. ... A point on the wave is a t