The temperature of the sun is T. If it becomes 2T, then

Options

A. the rate of emission of energy will become four times
B. the rate of emission of energy will be doubled
C. there will be considerable increase in the emission of infrared radiations
D. there will be considerable increase in the emission of ultraviolet radiations

Answer

D

Explanation

According to Stefan's law, `Q/tpropAT^(4)`
When the temperature becomes 2T, `Q/t` becomes 16 times.
Hence a and b are wrong.
By Wien's law, `lamda_(m)` T = constant (b)
`therefore` As T is increased, `lamda_(m)` is decreased. Thus, ultraviolet rays will be predominant.
`[lamda_("ultraviolet")ltlamda_("infrared")]`