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A Spherical Wave Spreads Out from a Source, and the Energy

Question 41

Multiple Choice

A spherical wave spreads out from a source, and the energy flux at a distance of R₀ is S₀. At a distance of 2R₀ the energy flux is

A) S₀/8.
B) S₀/4.
C) S₀/2.
D) S₀.

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