First slide

Refraction of light

Question

Refraction of light from air to glass and from air to water are shown in figure (i) and (ii) below. The value of the angle in the case of refraction as shown in figure (iii) will be

Moderate

Solution

$\begin{array}{l} A s p e r f i g (i) \\ μ_{a} \sin 60^{0} = μ_{g} \sin 35^{0} \\ A s p e r f i g (i i) \\ μ_{a} \sin 60^{0} = μ_{w} \sin 41^{0} \\ A s p e r f i g (i i i) \\ μ_{g} \sin θ^{0} = μ_{w} \sin 41^{0} \\ C o m p a r i n g (i) a n d (i i) w e g e t \\ θ = 35^{0} \end{array}$

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