Question
Physics Question on Ray optics and optical instruments
Sodium lamps are used in foggy conditions because
A
yellow light is scattered less by the fog particles
B
yellow light is scattered more by the fog particles
C
yellow light is unaffected during its passage through the fog
D
wavelength of yellow light is the mean of the visible part of the spectrum
Answer
yellow light is scattered less by the fog particles
Explanation
Solution
Sodium light emits monochromatic light which has only one colour (deep yellow). This colour is scattered less by the fog particles. While the other light sources comprise lights of many different colours ( of different wavelengths) so, they are scattered most due to they provide some degree of colour rendering.