Acoustics » Exercise – 1
1. For a propagation of acoustical waves the medium must be :
(a) plastic
(b) either elastic or plastic
(c) neither elastic nor plastic
(d) elastic
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2. It is possible to distinguish between longitudinal and transverse waves by studying the property of :
(a) reflection
(b) diffraction
(c) polarisation
(d) holography
Explanation
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3. During rainy season, we see lightning first and hear thundering of clouds a little later because :
(a) Due to moisture
(b) Velocity of sound is greater than the velocity of light
(c) Velocity of light is greater than the velocity of sound
(d) None of these
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4. Reverberation of sound in a hall results due to its continued :
(a) reflection of sound
(b) diffraction of sound
(c) absorption of sound
(d) interference of sound
Explanation
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5. The walls of a hall built for music concert should ……….. .
(a) reflect sound
(b) absorb sound
(c) amplify sound
(d) transmit sound
Explanation
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