2 points27.The ratio of amplitudes oftwo waves is 2:3. Find the ratioo

1.	2 points27.The ratio of amplitudes oftwo waves is 2:3. Find the ratioof their loudness.04:9O 9:4O8:27
Answer» ANSWER (i) Loudness of sound is DIRECTLY PROPORTIONAL to the square of amplitude i.e., Loudness (L)∝a2 Ratio of Loudness =L2L1=a22a12=(4)2(3)2=169=9:16 (ii) Change in amplitude of a sound does not affect its frequency. ∴ Ratio of FREQUENCIES remains same =1:1

2 points27.The ratio of amplitudes oftwo waves is 2:3. Find the ratioof their loudness.04:9O 9:4O8:27

Answer»

ANSWER

(i) Loudness of sound is DIRECTLY PROPORTIONAL to the square of amplitude i.e.,

Loudness (L)∝a2

Ratio of Loudness =L2L1=a22a12=(4)2(3)2=169=9:16

(ii) Change in amplitude of a sound does not affect its frequency.

∴ Ratio of FREQUENCIES remains same =1:1

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2 points27.The ratio of amplitudes oftwo waves is 2:3. Find the ratioof their loudness.04:9O 9:4O8:27​

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2 points27.The ratio of amplitudes oftwo waves is 2:3. Find the ratioof their loudness.04:9O 9:4O8:27