Who among the following discovered change in the wavelength of light that occurs when a light beam is deflected by molecules?

Option 1 -> Jagdish Chandra Bose was a physicist and botanist known for his pioneering work in radio waves and plant physiology, not light scattering.

Option 2 -> C. V. Raman discovered the Raman Effect in 1928, which describes the change in wavelength when light is scattered by molecules.

Option 3 -> Satyendra Nath Bose was a physicist famous for his work on quantum mechanics and Bose-Einstein statistics, not light scattering phenomena.

Option 4 -> Prafulla Chandra Roy was a renowned chemist known as the father of Indian chemistry, not associated with light wavelength discoveries.

Hence, Option 2: C. V. Raman -> He discovered the Raman Effect (Raman Scattering) in 1928, demonstrating that when light interacts with molecules, a small fraction of the scattered light experiences a change in wavelength due to energy exchange with molecular vibrations. This groundbreaking discovery earned him the Nobel Prize in Physics in 1930, making him the first Asian to receive a Nobel Prize in Science -> correct