Question

The angle between incident ray and reflected ray is 80°. Calculate the value of angle of incidence?

Answer 1

Explanation:

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Answer 2

∠i + ∠r = 80°

but,

∠i = ∠r

so,

∠i + ∠i = 80°

2∠i = 80°

∠i = 80°/2

∠i = 40°

So, the measure of angle of incidence is equal to 40°

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NOTE

∠i = angle of incidence

∠r = angle of reflection