About 5% of the power of a 100 W light bulb is converted to visible radiation . What is the average intensity of visible radiation
(a) at a distance of 1m from the bulb ?
(b) at a distance of 10 m ?
assume that the radiaton is emitted isotropically and neglect reflection

Explanation

To solve the problem, we need to find the average intensity of visible radiation emitted by a 100 W light bulb at two different distances (1 m and 10 m) from the bulb.

### Given:
- Power of the light bulb, \( P = 100 \, \text{W} \)
- Percentage of power converted to visible radiation = 5%
- Distance 1, \( r_1 = 1 \, \text{m} \)
- Distance 2, \( r_2 = 10 \, \text{m} \)

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