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Q.

The optical path of a monochromatic light is the same if it goes through 2.00cm of glass or x cm of ruby. If the refractive index of glass is 1.510 and that of ruby is 1.760 find the value of x is ....... cm

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a

2.716

b

1.716

c

2.525

d

1.525

answer is A.

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Detailed Solution

$\begin{array}{l} μ_{1} d_{1} = μ_{2} d_{2}, 2 \times 1.510 = x \times 1.760; x = \frac{2 \times 1.51}{1.716} \\ = 1.716 cm \end{array}$

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