Question

Light is incident on a flat surface, making an angle of 20° with that surface
(a) What is the angle of incidence?
(b) What is the angle of reflection? (c) Sketch the path of the reflected beam on the diagram.

Answer 1

Answer:

a) 20

b)20

Explanation:

As we know,

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

(i = r)

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Answer 2

Answer:

A)70 degrees B) 70 degrees , I can't answer c as i am writing this on a laptop

but try to make a diagram

Explanation:

since glance angle of incidence is 20 degrees,

Angle of incidence is 90 - Gi = 90 - 20 = 70 degrees

and angle of incidence = angle of reflection therefore b is also 70

Hope it helps