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The angle between an incident ray and the mirror is 30º:

a) What is the angle of incidence?

b) What is the angle of reflection?

c) What is the total angle turned by the ray?

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 Mar 12, 2020
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Angle of incidence is the angle between the normal to the mirror and the incident ray, so here that is 90 - 30 or 60 degrees.

 

The angle of reflection is the same, namely, 60 degrees. 

 

Total angle turned through by the ray is 360 - 60 - 60 = 240 degrees.

 Mar 12, 2020

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