Question -
Answer -
Power rating of bulb, P = 100 W
It isgiven that about 5% of its power is converted into visible radiation.
Power of visible radiation,
Hence, the power of visibleradiation is 5W.
(a) Distance of a point from the bulb, d = 1 m
Hence,intensity of radiation at that point is given as:
(b) Distanceof a point from the bulb, d1 = 10 m
Hence,intensity of radiation at that point is given as:
