The magnetic field of a beam emerging from a filter facing a flood light as given by B =…
Physics · Class 12 · CBSE — Electromagnetic Waves
The magnetic field of a beam emerging from a filter facing a flood light as given by B = 12 × 10–8 sin (1.20 × 107 z – 3.60 × 1015 t) T. The average intensity of the beam is
- 1.71 W m–2
- 2.1 W m–2
- 3.2 W m–2
- 2.9 W m–2
Answer
(A) 1.71 W m –2
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