Speed of light is given by:

$\overline{){\mathbf{v}}{\mathbf{=}}\frac{\mathbf{c}}{\mathbf{\eta}}}$

Where c is the speed of light in a vacuum, c = 3.0 × 10^{8} m/s

Part A

What is the speed of light in ethyl alcohol (*n* = 1.36)?

Part B

What is the speed of light in lucite (*n* = 1.50)?

Part C

What is the speed of light in crown glass (*n* = 1.52)?

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