<p>&nbsp;About 5% of the power of a 100W light bulb is converted to visible radiation. What is the average intensity of visible radiation?</p>

<p>(a) at a distance of 1m from the bulb?</p>

<p>(b) at a distance of 10m ?</p>

<p>Assume that the radiation is emitted isotropic ally and neglect reflection.&nbsp;</p>