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Olympiad workbook

Exam: Olympiad workbook
Subject: NSEP
Chapter: Ray Optics

Olympiad workbook · NSEP · Ray Optics

A point source S of light is placed at a depth d below the surface...

A point source

S

of light is placed at a depth d below the surface of water in a large and deep lake. Fraction of light that escapes in space above directly from water (refractive index

=\mu

) surface is given by A point source S of light is placed at a depth d below the surface of water in a large and deep lake. Fraction of light

A point source S of light is placed at a depth d below the surface of water in a large and deep lake. Fraction of light

Options

A $\sqrt{1-\frac{1}{\mu^2}}$
B $\frac{1}{2} \sqrt{1-\frac{1}{\mu^2}}$
C $\frac{1}{2}\left\{1-\sqrt{1-\frac{1}{\mu^2}}\right\}$
Ddepends on d and increases with increasing d

Correct answer

C. $\frac{1}{2}\left\{1-\sqrt{1-\frac{1}{\mu^2}}\right\}$

Step-by-step solution

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