What acoustic frequency is required of a plane acoustic wave in an acousto-optic cell so that a beam from a He-Ne laser is deflected by ? Consider the case of (a) flint glass for which the sound velocity is 3km/s and n=1.95 and (b) sapphire crystal with the sound velocity of 11km/s and n=1.76.
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\What acoustic frequency is required of a plane acoustic wave in an acousto-optic cell so that a beam from a He-Ne laser is deflected by ?
Consider the case of
(a) flint glass for which the sound velocity is 3km/s and n=1.95 and
(b) sapphire crystal with the sound velocity of 11km/s and n=1.76.
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