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Q.

The frequency of a light wave in a material is $2 \times 10^{14} Hz$ and wavelength is $5000 \overset{0}{A}$ . The refractive index of material will be

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a

1.50

b

1.33

c

1.40

d

3.00

answer is C.

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Detailed Solution

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$n = \frac{c}{v} = \frac{c}{λ f} = \frac{3 \times 10^{8}}{5000 \times 10^{- 10} \times 2 \times 10^{14}} = 3$

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