Question:-
Sun’s surface at 5800 k emits radiation at a wavelength of 0.5 mA furnace at 300°C will emit through a small opening radiation at a wavelength of nearly
Option (A)
10m
Option (B)
5m
Option(C)
0.25m
Option(D)
0.025m
Correct Option:
(B)
Question Solution:
Weins displacement law
lm.t = constant
= 0.5m x 5800 = l x 573
= l = 5.06m
question-answer-faq-3074