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

(a) According to Wein's displacement law
`lambda_mxxT=constant`
Here, `lambda_(m_3)ltlambda_(m_2)ltlambda_(m_1)`
`rArrT_3gtT_2gtT_1`

The temperature of Sun is higher than of welding
arc which in turn is greater than tungsten filament.