Acoustics – 1 – 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

ANSWER

EXPLANATION

2. It is possible to distinguish between longitudinal and transverse waves by studying the property of :

(a) reflection
(b) diffraction
(c) polarisation
(d) holography

ANSWER

EXPLANATION

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

ANSWER

EXPLANATION

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

ANSWER

EXPLANATION

5. The walls of a hall built for music concert should ……….. .

(a) reflect sound
(b) absorb sound
(c) amplify sound
(d) transmit sound

ANSWER

EXPLANATION

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