Q. In fog, photographs of the objects taken with infrared radiations are more clear than those obtained during visible light because
A) $I - R$ radiation has lesser wavelength than visible radiation
B) Scattering of $I - R$ light is more than visible light
C) The intensity of $I - R$ light from the object is less
D) Scattering of$\ I - R$ light is less than visible light
Explanation
(c) In fog, visible light is scattered more according to Rayleigh scattering, but scattering of infrared radiations is less due to high wavelengths, hence in fog, photographs of the objects taken with infrared radiations are clearer.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.