Question

Photoelectric Effect and Raman Effect can be explained on the basis of:
A. Newton’s Corpuscular theory of matter
B. Huygens wave theory of light
C. Maxwell’s Electromagnetic theory of light
D. Planck’s Quantum theory of light

Answer 1

Hint: Both Photoelectric Effect and Raman Effect are based on the phenomenon of scattering of light.
Raman scattering can be understood easily if the incident light is considered as consisting of particles, or photons.

Complete step by step answer:
When a beam of light falls on a metal surface, it gets deflected by the molecules of the metal. This effect is known as the photoelectric effect. Photoelectric effect is based on the principle of the emission of electrons when electromagnetic radiation, such as light, hits a material surface and photons eject out. Raman observed that not only the light gets deflected but its wavelength also changes. Raman scattering can be understood easily if the incident light is considered as consisting of particles, or photons with energy proportional to frequency, that strike the molecules of a surface. Later on Planck observed that different atoms and molecules can emit or absorb energy in a fixed quantity. The amount of energy of the radiation absorbed or emitted is directly proportional to the frequency of the radiation used. So both Photoelectric Effect and Raman Effect can be explained on the basis of Planck’s Quantum theory of light

So, the correct answer is “Option D”.

Note:
The phenomenon of Raman Effect is named for Indian physicist Sir Chandrasekhara Venkata Raman, who first published observations of the effect in 1928. The photoelectric effect was first discovered in 1887 by the German physicist Heinrich Rudolf Hertz. He observed that when ultraviolet light shines on two metal electrodes and a potential difference is applied across the electrodes, then the light changes the voltage at which sparking takes place.