Question:
The magnetic field of a beam emerging from a filter facing a floodlight is given by B0 = 12 × 10-8 sin (1.20 × 107z – 3.60 × 1015 t)T. What is the average intensity of the beam?
Solution:
B0 = 12 × 10-8 sin (1.20 × 107z – 3.60 × 1015 t)T
B0 = 12 × 10-8 T
Iav = 1.71 W/m2
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