Question

Mark the correct statement:

I) Directions in which the sound is incident and is reflected make equal angles with the normal to the reflecting surface

II) Reflection of sound occurs from a polished surface

III) Reflection of sound occurs from a rough surface

• A. I, II
• B. I, III
• C. II, III
• D. All

Answer 1

The correct option is D All

Sound bounces off a solid or a liquid like a rubber ball bounce off a wall. Like light, the sound gets reflected at the surface of a solid or liquid and follows the same laws of reflection.

The directions in which the sound is incident and is reflected make equal angles with the normal to the reflecting surface, and the three are in the same plane.

An obstacle of large size which may be polished or rough is needed for the reflection of sound waves.