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The refractive index of ruby is 1. 71 an...

The refractive index of ruby is 1. 71 and speed of light in air is `3 xx 10^(8) m//s`. Find speed of light in ruby.

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The correct Answer is:
`1.75xx10^(8) m//s`
`1.75xx10^(8) m//s`
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