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Sound is heard over longer distances on rainy days because
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- sound travels slowly in moist air
- sound travels faster in moist air
- moist air does not absorb sound
- moist air absorbs sound
- sound travels slowly in moist air
Correct Option: B
The speed of sound in a medium is inversely proportional to the square root of its density. Higher is the humidity in the air, greater will be the velocity of sound. Therefore, the speed of sound in moist air is more than that in dry air. This is why the sirens of mills, whistle of trains and others are heard up to longer distances on a rainy day than on a dry day.
