Question

If i and r respectively denote angle of incidence and angle of refraction then which of the following graphical variation is correct?

Options

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Answer 1

Explanation:

According to Snell’s law, 

$$\frac{\sin i}{\sin r} = \text{constant} = \mu$$

which means $$\sin i$$ is directly proportional to $$\sin r$$.

Thus, the graph between $$\sin i$$ and $$\sin r$$ is a straight line passing through the origin.