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Refractive Index

To the watche...

Question

To the watcher, how far away does the fish appear to be?

A

14.965 c m

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B

1.9475 c m

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C

14.975 c m

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D

1.497 c m

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Solution

The correct option is C $14.975 c m$
As we are considering wacher's veiw.
Apparent depth $\Rightarrow \frac{real depth}{μ}$ ; using formula $\to$
$\Rightarrow \frac{6.8}{μ water} + \frac{3}{uglass} + \frac{8}{Mair} \Rightarrow 6.8 \times \frac{3}{4} + 3 \times \frac{5}{8} + 8$
$\Rightarrow 14.975 c m$
Hence option 'c' is correct

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