In which layer are pressure and density so low that sound propagation becomes very limited?
Answer and explanation
Correct answer: Exosphere
The governing concept is that sound is a mechanical wave and requires enough particles to transfer vibrations. In the exosphere, gas density and pressure are extremely low, so particle collisions are too infrequent for ordinary sound to travel effectively. Hence option C is correct. The lower troposphere, marine boundary layer, and lower stratosphere are much denser and readily transmit sound, although weather can affect its speed and range.
Frequently asked questions
What is the correct answer to this question?
Exosphere
Why is this the correct answer?
The governing concept is that sound is a mechanical wave and requires enough particles to transfer vibrations. In the exosphere, gas density and pressure are extremely low, so particle collisions are too infrequent for ordinary sound to travel effectively. Hence option C is correct. The lower troposphere, marine boundary layer, and lower stratosphere are much denser and readily transmit sound, although weather can affect its speed and range.
Which subject and chapter does this question cover?
This is a Class 11 Accountancy question. Chapter: Theory Base of Accounting.
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