Reflection of Sound
Reflection of Sound
Reflection of sound wave: Like light, sound can also be made to change its direction and bounce back when it falls on a hard surface. The bouncing back of sound when it strikes a hard surface is known as reflection of sound. The reflection of sound does not require a smooth and shining surface like that of mirror, it can be reflected from any surface whether it is smooth or rough. Sound is reflected in the same way as light and follows the same laws of reflection, which are as follows:
1. The incident sound wave (AO), the reflected sound wave (OB) and the normal (ON) at the point of incidence, all lie in the same plane.
2. The angle of incidence (<AON) of sound is equal to the angle of reflection (<NOB) of sound.
Application of reflection of sound:
A wave of frequency 100 Hz is sent along a string towards a fixed end. When this wave travels back after reflection, a node is formed at a distance of 10 cm from the fixed end of the string. The speeds of incident (and reflected) waves are | |||
| Right Option : C | |||
| View Explanation | |||
A sound wave makes an angle | |||
| Right Option : B | |||
| View Explanation | |||
The direction of an incident sound makes an angke of | |||
| Right Option : B | |||
| View Explanation | |||
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