Question

a light ray is incident on the plane mirror , as shown .the value of 0 is​

Answer 1

Answer:

120 degrees

Explanation:

look the ray and mirror 1 is parallel

now angle of incidence is equal to the angle of reflection.

therefore then angle btw the normal and ray of incidence is 60 and now the angle btw normal and ray of reflection is again 60 there fore the angle is 60+60=120

and 120 and Ф are alternate interior angle

therefore  Ф is 120 degrees

Answer 2

60+60=120

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