Heat and Thermodynamics 3 Question 10
10. 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?
$(2005,2 M)$
(a) Sun- $T _1$, tungsten filament- $T _2$, welding arc- $T _3$
(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- $T _3$, welding arc- $T _2$
Show Answer
Solution:
- $\lambda _m T=$ constant
From the graph $T _3>T _2>T _1$
Temperature of Sun will be maximum.
Therefore, (c) is the correct option.
NOTE Although graphs are not very clear.
