Question Detail

PHY 104 Pitch, loudness, quality, timber Objective Question
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Question

The text explains that the inverse-square law for sound intensity is analogous to the behavior of electric or gravitational fields. What is the fundamental reason for this analogy?
Options
A Sound waves are electromagnetic in nature.
B The energy from the source spreads out spherically.
Correct Answer
C The speed of sound varies with distance.
D It is a direct consequence of the Doppler effect.
Correct Answer

Option B is the correct answer.

Detailed Explanation

The text states: 'This is because the charge is constant, just as the energy sent out at the source is constant at the source. The energy spreads out spherically very much as the electric field of a point charge or the gravitational field of a mass spread out.'

Hint

Consider how energy from a point source propagates in three dimensions.

Question Info

Course: PHY 104
Topic: Pitch, loudness, quality, timber
Type: Objective
Difficulty: Not specified
Question 393 of 947
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