Question

A sound wave strikes the reflecting surface at an angle of 70 degree. What is the angle between the incident sound wave and the reflected sound waves?

Answer 1

• From the laws of reflection, the angle of incidence is equal to the angle of reflection.
• The angle between incident and reflected sounds is equal to the sum of angle of incidence and angle of reflection.
• As the angle of incidence and reflection are equal to each other, the angle between incident and reflected sounds is equal to twice the angle of incidence, that is, 2 times of 70 degrees, which is equal to 140 degrees.