Variation of radiant energy `Elambda` emitted by sun, filament of tungsten lamp and welding arc as a function of its wavelength as shown in the figure. Which of the following option is the correct match ?
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
Text Solution
Verified by Experts
The correct Answer is:
A
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.
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