Optics Question 304
Question: In which one of the following regions of the electromagnetic spectrum will the vibrational motion of molecules give rise to absorption
[SCRA 1994]
Options:
A) Ultraviolet
B) Microwaves
C) Infrared
D) Radio waves
Show Answer
Answer:
Correct Answer: B
Solution:
Molecular spectra due to vibrational motion lie in the microwave region of EM-spectrum. Due to Kirchhoff’s law in spectroscopy the same will be absorbed.
