The slide is about compton effecct , it's a part of modern physics. Which support photo electric effect. The Compton Effect, also known as Compton Scattering, is a phenomenon in physics that provides evidence for the wave-particle duality of light and helps confirm the quantum nature of electromagnetic radiation. It was discovered by American physicist Arthur H. Compton in 1923 and played a crucial role in developing the understanding of the behavior of photons, the fundamental particles of light. The Compton Effect describes the scattering of a photon (quantum of light) off an electron. When a photon interacts with an electron, it can transfer some of its energy and momentum to the electron. As a result of this interaction, the photon's frequency decreases and its wavelength increases, leading to a change in its color (shift towards longer wavelengths). The change in wavelength depends on the angle, through which the radiation is scattered. The scattering phenomenon was first observed by A.H. Compton and is known as Compton effect. The total energy in the Compton effect can be explained mathematically using the principles of conservation of energy and momentum. Let's break down the mathematical explanation of the total energy involved in the Compton effect: Conservation of Energy: The conservation of energy states that the total energy before an interaction is equal to the total energy after the interaction. In the Compton effect, this means that the energy of the incident photon plus the initial energy of the electron is equal to the energy of the scattered photon plus the final energy of the electron. Mathematically, this can be expressed as: E_initial_photon + E_initial_electron = E_final_photon + E_final_electron 2.Conservation of Momentum: The conservation of momentum states that the total momentum before an interaction is equal to the total momentum after the interaction. In the Compton effect, this means that the momentum of the incident photon plus the momentum of the initial electron is equal to the momentum of the scattered photon plus the momentum of the final electron. Mathematically, this can be expressed as: p_initial_photon + p_initial_electron = p_final_photon + p_final_electron