First slide

Refraction of light

Question

The figure shows a light ray starting from the corner E of the bottom of a tank filled with a liquid reaching an observer O. The refractive index of the liquid with respect to air is

Moderate

Solution

$\begin{array}{l} A s p e r d r a w i n g, \\ \sin i = \frac{1}{2} a n d r = 90^{o} \\ N o w u s e, S n e l l' s L a w \\ μ \sin i = (1) \sin r \\ \Rightarrow μ = \frac{\sin r}{\sin i} = \frac{1}{\frac{1}{2}} = 2 \end{array}$

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