MHT CET · Physics · Oscillations
Sound waves are not transmitted a long distance because
- A they are absorbed by the atmosphere
- B they have constant frequency
- C the height of antenna required should be very high
- D velocity of sound waves is very less
Answer & Solution
Correct Answer
(A) they are absorbed by the atmosphere
Step-by-step Solution
Detailed explanation
There are several factors which affect the propagation of sound. These are geometric spreading, atmospheric effect and surface effects. There are two mechanisms by which acoustic energy is absorbed by the atmosphere. These are molecular relaxation and viscosity effects. The amount of absorption depends on the temperature and humidity of the atmosphere. Note Under normal circumstances atmospheric absorption can be neglected except where long distances or very high frequencies are involved.
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