Question

If the reflected and incident sound are at an angle of 90 degrees with each other, the incident angle
should be:
a. 60 degrees
b. 30 degrees
c. 45 degrees
d. 180 degrees

Answer 1

60 degrees..

. ..........

Answer 2

c-45

as one side will be 45 degrees the other side also will be 45 degrees as the angles are supposed to be equal

any other andle wouldnt work on such conditions