Physics 2013 JAMB Past Questions - Question 48: The particle nature of light is demonstrated by the

Correct Answer

A

Explanation

Phenomena such as emission and absorption of light photoelectric effect, radiation of energy from heated bodies and thermionic emission can only be understood by assuming the particle nature of matter.
photoelectric effect, where light is observed to behave as discrete packets of energy called photons. When light interacts with certain materials, such as metals, it can cause the ejection of electrons from the material. This phenomenon cannot be explained by classical wave theory but can be understood by considering light as a stream of particles. The energy of each photon is directly proportional to its frequency, and when the energy of a photon exceeds the binding energy of an electron in the material, the electron is ejected. This experiment provided strong evidence for the particle nature of light and contributed to the development of quantum mechanics.