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Physics · 2025 · 3 marks
CBSE 2025 · Region 5 · Set 3 · Q25
A right-angled prism ABC (refractive index √ 2 ) is kept on a plane mirror as shown in the figure. A ray of light is incident normally on the face…
A right-angled prism ABC (refractive index $\displaystyle \sqrt{2}$ ) is kept on a plane mirror as shown in the figure. A ray of light is incident normally on the face AC.
(a)
Trace the path of the ray as it passes through the prism.
(b)
Find the angle of deviation produced by the prism.
Marking-scheme solution
(a)
$\displaystyle \sin i_{c}=\frac{1}{\sqrt{2}}$
$\displaystyle i_{c}=45^{\circ}$
(b)
The angle of deviation is $\displaystyle 180^{\circ}$ from the diagram.
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