TS EAMCET · Physics · Electromagnetic Waves
If of the power of a light bulb is converted to visible radiation, then the average intensity of visible radiation at a distance of is
- A
- B
- C
- D
Answer & Solution
Correct Answer
(A)
Step-by-step Solution
Detailed explanation
The intensity is defined as power radiated per unit area here power, P=100π W, but in the question we want to calculate only for ten percent of origin it means, P'=10π W, so the intensity, I=P'4πd2=10π4π102=0.025 W m-2.
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