Question

angle of incidence of sound = 30 degree angle of reflection of sound = 60 degree then angle I - angle r​

Answer 1

Answer:

Explanation:

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Answer 2

Answer:

The sum of the angle of incidence and this angle (30) makes a right angle. So, the angle of incidence is 90 - 30 = 60 degrees. As the angle of incidence and the angle of reflection are equal, both angles equal 60 degrees