Question

3. [10pl Describe the photoelectric effect. a. 2] Make a sketch of the experimental setup. Clearly indicate, what parameters are varied in the experiment and where they occur b. 2] Provide diagrams for observations made in the experiment. Show the essential two (2) diagrams that (seemingly) "contradict" classical physics expectations (see part c). Clearly label axes and state constraints under which the experiment was carried out, c.12] Formulate expectations based on classical physics. Provide the essential two (2) diagrams that contrast the observations (see part b) clearly label axes and state constraints d. I4] Explain how Einstein accounts for the photoelectric effect. Formulate the rational of the observation

Answer 1

Photoelectric effect E = mc^2 + hv where, m = mass of photon c = velocity of light v = frequency of light (threshold) photo electric effect is the phenomenon in physics when light photons strick on the metal surface, the electron on the metal surface gets enough 'hv' amount of energy form the light & emits from the surface of the metal The amount of frequency required to gets emit electron from the surface of metal plate is called the threshold frequency of light below then the threshold frequency then electrons fail to emits themselves from the surface of the metal This experiment shows that the light is practical in nature According to Planck's constant quantas are only imaginary concept \r\n but with the help of this experiment Einstein shows that quantas are real in concept. Eisenstein's resolved the problem using Planck's revolutionary idea that light has a particle. The energy carried by each particle of light