If in the experiment to verify laws of reflection of sound, the back surface is replaced by rough surface then
a. no reflection of sound takes place b. reflected sound will have same loudness c. sound will be heard with lesser intensity than the incident sound d. sound will be heard with greater intensity

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Solution

The rough surface also reflects the sound, but in various directions, which is called as diffused reflection.

As sound energy scatters in various directions, the sound intensity in a particular direction becomes less.

Hence, the sound will be heard with lesser intensity than the incident sound

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Similar questions

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

For reflection of sound, " The size of the reflecting surface should be bigger than the wavelength of sound ." Why ?

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