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Standard VIII

Physics

Luminous Intensity

A point sourc...

Question

A point source of light is placed at the bottom of a water lake. If the area of the illuminated circle on the surface is equal to $3$ times the square of the lake. The refractive index of water is

\sqrt{π + 1}

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\sqrt{\frac{π}{3} + 1}

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\frac{π}{3} + 1

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\frac{π}{4} + 1

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Solution

The correct option is B $\sqrt{\frac{π}{3} + 1}$
Hence, option $(B)$ is correct answer.

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A point source of light is placed at the bottom of a water lake. If the area of the illuminated circle on the surface is equal to 3 times the square of the lake. The refractive index of water is

The correct option is B √π3+1Hence, option (B) is correct answer.

A point source of light is placed at the bottom of a water lake. If the area of the illuminated circle on the surface is equal to $3$ times the square of the lake. The refractive index of water is

The correct option is B $\sqrt{\frac{π}{3} + 1}$
Hence, option $(B)$ is correct answer.