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Q.

Optical path for yellow light is same if it passes through 4cm of glass or 6cm of water. If the refractive index of water is 4/3 , what is the refractive index of glass?

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a

2

b

16/9

c

3/4

d

1.5

answer is A.

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Detailed Solution

$μ_{g} t_{g} = μ_{w} t_{w} \Rightarrow μ_{g} = \frac{μ_{w} t_{w}}{t_{g}} \frac{4 / 3 \times 6}{4} = 2$

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