Question
Physics Question on Ray optics and optical instruments
In fog, photographs of the objects taken with infra-red radiations are more clear than those obtained during visible light because
A
scattering of l-R light is more than visible light
B
the intensity of I-R light from the object is less
C
scattering of l-R light is less than visible light
D
l-R radiation has lesser wavelength than visible radiation
Answer
scattering of l-R light is less than visible light
Explanation
Solution
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 more clear.