Who among the following discovered that when light traverses a transparent material, some of the light that is deflected changes in wavelength?
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → C. V. Raman
This is the Raman effect. When light passes through a transparent substance, most of the scattered light keeps its wavelength, but a small part comes out with a changed wavelength, because it has given energy to, or taken energy from, the molecules. C. V. Raman announced the discovery on 28 February 1928, working with K. S. Krishnan, and received the Nobel Prize in Physics in 1930. India marks 28 February as National Science Day.