Question

collect the values of refractive index of the following media , water, coconut oil, Flint glass, diamond, benzene, crown glass and hydrogen gas​

Answer 1

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Refractive index of a medium is the ratio of speed of light in air to speed of light in that medium. If there is a substance A then the refractive index of A is given by :

$r.i = \frac{v_c}{v_a}$

Here :- v_c = velocity of light in air

v_a = velocity of light in medium A.

Refractive index have no unit.

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Now, Speed of light in water is 225 m /s

Thus we get refractive index of water to be :

$r.i = \frac{3 \times {10}^{8} }{225}$

$r.i = 1.33$

Refractive index of water = 1.33

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Speed of light in coconut oil = 2 × 100000000m/s

Thus refractive index of coconut oil =

$r.i = \frac{3 \times {10}^{8} }{2 \times {10}^{8} }$

Refractive index of coconut oil = 1.44

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Speed of light in flint glass is 1.81 × 100000000m/s

$r.i = \frac{3 \times {10}^{8} }{1.81 \times {10}^{8} }$

Refractive index of flint glass = 1.65

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Speed of light in diamond is 125m/s

$r.i = \frac{3 \times {10}^{8} }{125}$

Refractive index of diamond = 2.42

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Speed of light in benzene is 3× 100000000m/s

$r.i = \frac{3 \times {10}^{8} }{2 \times {10}^{8} }$

Refractive index of benzene = 1.5

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Speed of light in crown glass is 1.67 × 100000000m/s

$r.i = \frac{3 \times {10}^{8} }{1.67 \times {10}^{8} }$

Refractive index of crown glass = 1.52

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Refractive index of hydrogen gas is always taken as 1.

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BY SCIVIBHANSHU

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