Variation of radiant energy emitted by sun, filament of tungsten lamp and welding arc as a function of its wavelength is shown in figure. Which of the following option is the correct match?

Options

A. Sun `T_(3)` , tungsten filament `-T_(1)` , welding arc `-T_(2)`
B. Sun `-T_(2)`, tungsten filament `T_(1)` , welding arc `-T_(3)`
C. Sun `-T_(3)` , tungsten filament `-T_(2)`, welding arc `-T_(1)`
D. Sun `-T_(1)`, tungsten filament `-T_(2)` , welding arc `-T_(3)`

Answer

A

Explanation

According to Wien’s displacement law
`lambda_(m)xxT=`constant
Here `lambda_(m)3ltlambda_(m)2ltlambda_(m)1rArrT_(3)gtT_(2)gtT_(1)`
The temperature of the sun is higher than that of the welding arc which in turn is greater than the tungsten filament (A) is the correct option.