Question

What is respirationtwo plane mirrors AB and AC are inclined at an angle theta 20 degree. A ray of light starting from point P is incident at point Q on the mirror AB,then ar R on mirror AC and again at S on AB finally the ray ST goes parallel to mirror AC.
.
.
.
.
.
.

.

.
.
.
.
.
.
.
Guys Plz Subscribe This Channel 100 karwado please​

Answer 1

Answer:

Correct option is

B

30

o

ΔACD

90−i+2x+θ=180

x=

2

90+i−θ

ΔABC

α+2i+x=180

θ+90−i+2i+90−x=180

θ+i−x=0

θ+i=

2

90+i−θ

2θ+2i=90+i−θ

i=90−3θ=90−3×20

=30

[email protected] my email I'd mesged me