Why Does the Intensity of Waves from a Small Source

question 51

Multiple Choice

Why does the intensity of waves from a small source decrease with the square of the distance from the source?

• A) The frequency of the waves decreases as they get farther from the source.
• B) The waves run out of energy as they travel.
• C) The medium through which the waves travel absorbs the energy of the waves.
• D) The waves slow down as they travel away from the source.
• E) The waves spread out as they travel.

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