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. 1-buld, 2 `rarr` welding arc, 3 `rarr` sun
B. 2-buld, 3 `rarr` welding arc, 1 `rarr` sun
C. 3-bulb,1 `rarr` welding arc, 2 `rarr` sun
D. 2-bulb, 1 `rarr` welding arc, 3 `rarr` sun

Answer

A

Explanation

According to Wien's displacement law
`lambda_(m)T = constant :. T prop (1)/(lambda_(max))`
form graph `lambda_(max(1)) gt lambda_(max(2)) gt lambda_(max(3))`
`:. T_(1) lt T_(2) lt T_(3)`
the material having lower temperature has the graph having lower peak.