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In solar radiation, the intensity of radiation is maximum around the wavelength λm. If R is the radius of the sun and c is the velocity of light, the mass lost by the sun per unit time is proportional to(a) R2 / λ4C2(b) R2 / λ2C2(c) R3 / λ4C3(d) R3 / λ4C2 |
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Answer» Correct Answer is: (a) R2 / λ4C2 Let T be the temperature of the surface of the sun. ∴ Wien constant, b = λmT. The energy lost by the sun per unit time is (σT4) (4πR2) = mc2. |
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