About 6% of the power of a 100 W light bulb is converted to visible radiation. The…
Physics · Class 12 · CBSE — Electromagnetic Waves
About 6% of the power of a 100 W light bulb is converted to visible radiation. The average intensity of visible radiation at a distance of 8 m is (Assume that the radiation is emitted isotropically and neglect reflection.
- 3.5 × 10–3 W m–2
- 5.1 × 10–3 W m–2
- 7.2 × 10–3 W m–2
- 2.3 × 10–3 W m–2
Answer
(B) 5.1 × 10 –3 W m –2
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