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If the Difference in Velocities of Light in Glass and Water is 2.7 X 10 ^7 M/S, Find the Velocity of Light in Air. - Physics

If the difference in velocities of light in glass and water is 2.7 x 107 m/s, find the velocity of light in air. (Refractive index of glass = 1.5, Refractive index of water = 1.333)

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Solution

`u=C/v`

`:.v_g=C/mu_g`

`v_w=C/mu_w`

`:.v_w-v_g=C/mu_w-C/mu_g`

`2.7xx10^7=C(3/4-2/3)`

`2.7xx10^7=C((9-8)/12)`

C = 2.7x12x107

=3.24x108m/ s

Concept: Equation for Velocity and Energy at Different Positions of Vertical Circular Motion
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