Question

observe the following set-up showing the activity on reflection of sound.If angle of incidence+ angle of reflection shown in the below figure is 120 degree.Find angle of.incidence​

Answer 1

Answer:

60 degree

Explanation:

We know that angle of incidence = angle of reflection

<i=<r.........equation 1

we are given that <i+<r=120

therefore, from equation 1,

<i+<i=120

2<i=120

<i=120/2

<i=60

Therefore angle of incidence is 60 degrees....

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