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Variation of radiant energy Elambda emit...

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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Knowledge Check

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