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 [2005]

Question

Smart Achievers · Accepted Answer

(1)

According to Wein's displacement law

$λ_{m} \times T = constant$

$From the graph, λ_{m_{3}} < λ_{m_{2}} < λ_{m_{1}}$

$∴$ $T_{3} > T_{2} > T_{1}$

The temperature of Sun - $T_{3}$ is higher than that of welding arc $T_{2}$ which in turn is greater than tungsten filament - $T_{1}$ .

Solution

Q.
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 [2005]

1 Sun- $T_{3}$ , tungsten filament- $T_{1}$ , welding arc- $T_{2}$

2 Sun- $T_{2}$ , tungsten filament- $T_{1}$ , welding arc- $T_{3}$

3 Sun- $T_{3}$ , tungsten filament- $T_{2}$ , welding arc- $T_{1}$

4 Sun- $T_{1}$ , tungsten filament- $T_{2}$ , welding arc- $T_{3}$

Ans.
(1)

According to Wein's displacement law

$λ_{m} \times T = constant$

$From the graph, λ_{m_{3}} < λ_{m_{2}} < λ_{m_{1}}$

$∴$ $T_{3} > T_{2} > T_{1}$

The temperature of Sun - $T_{3}$ is higher than that of welding arc $T_{2}$ which in turn is greater than tungsten filament - $T_{1}$ .

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Solution

Q. 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 [2005]

1 Sun-T3, tungsten filament-T1, welding arc-T2

2 Sun-T2, tungsten filament-T1, welding arc-T3

3 Sun-T3, tungsten filament-T2, welding arc-T1

4 Sun-T1, tungsten filament-T2, welding arc-T3