Complete the sentence with the right option.
To reflect the sound waves from any surface, the surface should have dimensions ____________.

see full answer

Start JEE / NEET / Foundation preparation at rupees 99/day !!

21% of IItians & 23% of AIIMS delhi doctors are from Sri Chaitanya institute !!

An Intiative by Sri Chaitanya

always less than the wavelength of a sound wave

equal or less than the wavelength of a sound wave

equal or greater than the wavelength of a sound wave

always greater than the wavelength of a sound wave

answer is D.

(Unlock A.I Detailed Solution for FREE)

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

Detailed Solution

During reflection, sound waves obey the law of reflection.
To have an appreciable reflection of a sound wave from any surface, it should have a dimension equal to or greater than the wavelength of a sound wave falling on it.
That is, a smaller object will not reflect the sound waves of a larger wavelength.

Therefore, 'equal to or greater than the wavelength of a sound wave' is the correct response.

Watch 3-min video & get full concept clarity