While doing experiment on verifying the laws of reflection of sound, four students measured the angle `lt I and lt r` . The correct measurement of the angles of incidence and angle of reflections has been done by student :

Options

A. A
B. B
C. C
D. D

Answer

A

Explanation

The angle of incidence (i) and angle of reflection (r) are measured with respect to the normal at the point of incidence.