Question
In the diagram, a ray is passing through a broken prism, find angular deviation for the ray
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Answer
(d)
From triangle interior angles
$A=180^{\circ}-60^{\circ}-30^{\circ}$
$=90^{\circ}$
$i+e=A+\delta$
$45^{\circ}+60^{\circ}=90+\delta$
$\therefore \delta=15^{\circ}$
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