Answer
$65^{\circ}$
Work Step by Step
We can find the required angle of reflection as follows:
$\theta _{2i}=120^{\circ}-\theta _{1r}$
$\theta_{2i}=120^{\circ}-55^{\circ}=65^{\circ}$
As $\theta_{2r}=\theta_{2i}$
$\implies \theta_{2r}=65^{\circ}$
Physics Technology Update (4th Edition)
by Walker, James S.
Published by
Pearson
ISBN 10:
0-32190-308-0
ISBN 13:
978-0-32190-308-2
Chapter 26 - Geometrical Optics - Problems and Conceptual Exercises - Page 939: 2
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