Transmission Of Heat Question 145
Question: Certain substance emits only the wavelengths $ {\lambda _{1}},\ {\lambda _{2}},\ {\lambda _{3}} $ and $ {\lambda _{4}} $ when it is at a high temperature. When this substance is at a colder temperature, it will absorb only the following wavelengths
[MP PET 1990]
Options:
A) $ {\lambda _{1}} $
B) $ {\lambda _{2}} $
C) $ {\lambda _{1}} $ and $ {\lambda _{2}} $
D) $ {\lambda _{1}},\ {\lambda _{2}},\ {\lambda _{3}} $ and $ {\lambda _{4}} $
Show Answer
Answer:
Correct Answer: D
Solution:
According to Kirchoff’s law in spectroscopy. If a substance emit certain wavelengths at high temperature, it absorbs the same wavelength at comparatively lower temperature.
BETA
