Transmission Of Heat Question 266
Question: If the temperature of the sun becomes twice its present temperature, then
[MP PET 1989; RPMT 1996]
Options:
A) Radiated energy would be predominantly in infrared
B) Radiated energy would be predominantly in ultraviolet
C) Radiated energy would be predominantly in X-ray region
D) Radiated energy would become twice the present radiated energy
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Answer:
Correct Answer: B
Solution:
The wavelength corresponding to maximum emission of radiation from the sun is $ {\lambda _{\max }}=4753{\AA} $ (close to the wavelength of violet colour of visible region). Hence if temperature is doubled lm is decreased $ ( {\lambda _{m}}\propto \frac{1}{T} ) $ i.e. mostly ultraviolet radiations emits.
BETA
