(ii) Effect of intensity of incident radiations on photoelectric current: For frequency of radiations as constant. (iii) Effect of frequency of the incident radiations on stopping potential: For constant intensity. The stopping potential Vo depends on(i) The frequency of incident light and (ii) the nature of emitter material. For a given frequency of incident light, the stopping potential is independent of its intensity. eVo =(1/2)mv2max=Kmax From this graph between frequency ν, stopping potential Plank's constant (h) can be determined Law of Photoelectric effect- De-Broglie Hypothesis- According to de Broglie, every moving particle is associated with a wave which controls the particle in every respect. The wave associated with a particle is called matter wave or de Broglie wave. λ =h/p = h/mv This is known as de-Broglie equation. de-Broglie wavelength of an electron of kinetic energy K- Davisson and Germer experiment- This experiment proves the existence of de-Broglie waves.It establishes the wave nature of electron particle. Theory-A sharp diffraction is observed in the electron distribution at an accelerating voltage of 54 V and scattering angle 50°. The maximum of intensity obtained in a particular direction is due to constructive interference of electrons scattered from different layers of the regularly spaced atoms of the crystal. Questions/Answers related to this topic
(ii) Effect of intensity of incident radiations on photoelectric current: For frequency of radiations as constant. (iii) Effect of frequency of the incident radiations on stopping potential: For constant intensity. The stopping potential Vo depends on(i) The frequency of incident light and (ii) the nature of emitter material. For a given frequency of incident light, the stopping potential is independent of its intensity. eVo =(1/2)mv2max=Kmax From this graph between frequency ν, stopping potential Plank's constant (h) can be determined Law of Photoelectric effect- De-Broglie Hypothesis- According to de Broglie, every moving particle is associated with a wave which controls the particle in every respect. The wave associated with a particle is called matter wave or de Broglie wave. λ =h/p = h/mv This is known as de-Broglie equation. de-Broglie wavelength of an electron of kinetic energy K- Davisson and Germer experiment- This experiment proves the existence of de-Broglie waves.It establishes the wave nature of electron particle. Theory-A sharp diffraction is observed in the electron distribution at an accelerating voltage of 54 V and scattering angle 50°. The maximum of intensity obtained in a particular direction is due to constructive interference of electrons scattered from different layers of the regularly spaced atoms of the crystal. Questions/Answers related to this topic