Physics, 26.08.2019 21:00 jhgfd1170

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wh
the speed of light in a vacuum is approximately 2.99 x 108
m/s, and the speed of light through a piece of glass is
approximately 1.97 x 108 m/s.
what is the index refraction for the piece of glass?

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Prescriptive test
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the speed of light in a vacuum is approximately 2.99 x...