Question

69. The angle between an incident ray and the plane mirror
is 30°. The total angle between the incident ray and
reflected ray will be:
(a) 30°
b)60
(c) 90°

d) 120​

Answer 1

Answer:

reflected angle = 30

therefore total = 30+30 =60

therefore answer will be 60°

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Answer 2

Answer :

d ) 120 degree..

Explanation :

Angle b/w incident ray and plane mirror = 30 degree

so, Angle b/w reflected ray and plane mirror = 30 degree ( incident angle = reflected angle)

let angle b/w the incident ray and reflected ray be x

Now, 30 + 30 degree + x = 180 degree.

X = 180 - 60 = 120 degree.

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