Calculate the electric and magnetic fields produced by the radiation coming from a `100` W bulb at a distance of `3 m`. Assume that the efficiency of the bulb is `25%` and it is a point source.

Explanation

To solve the problem of calculating the electric and magnetic fields produced by the radiation from a 100 W bulb at a distance of 3 m, we will follow these steps:

### Step 1: Calculate the Effective Power Output
The efficiency of the bulb is given as 25%. Therefore, the effective power output (P_eff) can be calculated as:
\[ P_{\text{eff}} = \text{Efficiency} \times \text{Total Power} = 0.25 \times 100 \, \text{W} = 25 \, \text{W} \]

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