A progressive wave has intensity 8 W/m^2. If its amplitude is multiplied by 0.25, its new intensity is:

  1. 0.5 W/m^2
  2. 5 W/m^2
  3. 0.25 W/m^2
  4. 1 W/m^2
Answer

A) 0.5 W/m^2

I propto A^2, so I = 8 (0.25)^2 = 0.5 W/m^2. SLO P-11-D-01 · Application

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