Sound | Reflection of Sound | CBSE Class 9 Science | Physics Dear Student,
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Hello students, here in this video, we are going to study a very interesting and important topic as, a reflection of sound from a chapter Sound of CBSE class 9 science physics.
Reflection of Sound:
Just like light, the sound gets reflected at the surface of a solid or liquid.
The bouncing back of sound when it strikes the surface of a solid or liquid is called the reflection of sound.
Hard surfaces(like mountain, wall, metals) are good reflectors of sound while soft surfaces(like cloth, paper, etc) are bad reflectors of sound.
Laws of reflection of sound:
1. The incident sound wave, the reflected sound wave, and the normal at the point of incidence all lie in the same plane.
2. The angle of an incident sound wave is equal to the angle of reflection of a sound wave. But only important here is that the sound wave needs rough or polished and large obstacles in very much necessary.
Use of Reflection of Sound:
1. Loudspeaker, Megaphone, bulb horn
2. Stethoscope
3. Soundboard
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