Question

to make the experimenta for verifying the law of reflection of sound​

Answer 1

Answer

Reflection follows the two basic laws,

1) The angle of incidence is equal to the angle of reflection. 

Here angle of incidence or reflection is the angle that the incident ray or the reflected ray respectively, makes with the normal at the point of reflection.

2) The incident ray, reflected ray and the normal at the point of incidence all lie on the same plane.

Answer 2

Explanation:

narrow tubes are used in the verification of laws of reflection of sound. the narrow tubes are because they make sound waves to: (a)move in straight lines. ... Narrow tubes prevent the spreading of sound and thus contain them.