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When one light ray is reflected from a plane mirror with $30^{\circ}$ angle of reflection, the angle of deviation of the ray after reflection is:
Option: 1
$140^{\circ}$

Option: 2
$130^{\circ}$

Option: 3
$120^{\circ}$

Option: 4
$110^{\circ}$

Answers (1)

best_answer

$\delta=\Pi-2 \mathrm{i}=\Pi-2 \times 30$
$=180-60=120^{\circ}$

Posted by

manish

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