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The wavelength of yellow sodium light in...

The wavelength of yellow sodium light in air is 589 nm. (a) What is its frequency? (b) What is its wavelength in glass whose index of refraction is 1.52? (c) From the results of (a) and (b), find its speed in this glass.

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(a) `5.09 xx 10^(14)` Hz, (b) 387.5 nm, (c) `1.97 xx 10^(8) m // s`
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