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States and explain the inverse square Law of radiation. |
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Answer» SOLUTION :The intensity of HEAT radiation at a point varies inversely as the square of that point from the source. i.e.,`I prop (1)/(r^(2))`: If `I_(1)`and `I_(2)` be the intensities of the thermal radiation at distance `r_(1)` and `r_(2)`from the source then `I_(1) prop (1)/(r_(1)^(2)) and I_(2) prop (I)/(r_(2)^(2)) therefore(I_(1))/(I_(2)) prop (r_(2)^(2))/(r_(1)^(2))` |
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