The magnetic field of a bram emerging from a filter facing a floodlight is given by
` B= 12 xx 10^(-8 ) sin ( 1.20 xx 10^(7) z- 3.60 xx 10 ^(15) t ) t.`
what is the average intensity of the beam ?

Explanation

To find the average intensity of the beam given the magnetic field \( B = 12 \times 10^{-8} \sin(1.20 \times 10^{7} z - 3.60 \times 10^{15} t) \), we will follow these steps:

### Step 1: Identify the amplitude of the magnetic field
The amplitude \( B_0 \) of the magnetic field can be directly read from the equation:
\[ B_0 = 12 \times 10^{-8} \, \text{T} \]

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