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Refraction through a Rectangular Glass Slab

The angle of ...

Question

The angle of incidence is equal to the angle of refraction

A

True

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B

False

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Solution

The correct option is B False
Explanation
Snell's Law states that
$\frac{\sin i}{\sin r} = \frac{μ_{1}}{μ_{2}}$
where i is the angle of incidence
r is the angle of refraction
$μ_{1}$ and $μ_{2}$ are the refractive indices of medium 1 and 2.
If refraction is taking place i.e. two different media of different optical densities are involved.
Thus, $μ_{1}$ is not equal to $μ_{2}$ .
$\sin i$ is not equal to $\sin r$ .
$i$ is not equal to $r$ .
Thus, the angle of incidence is not equal to the angle of refraction.
Hence, the statement is false.

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