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When a photon collides with an electron at rest, the photon gives its energy to the electron. Therefore the scattered photon photon after the collision will have a higher wavelength lower energy compared to the wavelength of the incident photon photon before the collision. This shift in wavelength is called the Compton shift. The effect is named after American physicist Arthur Holly Compton , who first discovered this effect. Photoelectric Effect : It is the phenomenon of emission of electrons from the surface of metals when light radiations Electromagnetic radiations of suitable frequency fall on them.
The emitted electrons are called photo-electrons and the current so produced is called photoelectric current. Important Points The observations and results of the experimental study of photoelectric effect are collectively called Laws of photoelectric emission and are as follows: 1 The number of photoelectrons that are emitted from the metal depends on the intensity of the incident light but is independent of its frequency. Additional Information Pauli's Principle states that no two electrons in the same atom can have identical values for all four of their quantum numbers.
Minimum kinetic energy of electrons Maximum kinetic energy of electrons Mean kinetic energy of electrons None of the above. The maximum energy of ejected electrons from the metal surface after ejection is called maximum kinetic energy KE max. Therefore option 1 is correct. When we increase the number of photons or intensity of the incident radiations then the number of electrons ejected will increase but the maximum kinetic energy of electrons will not change. Concept: Photoelectric effect: When a light of sufficiently small wavelength is incident on the metal surface, electrons are ejected from the metal instantly.
Stopping potential - The photocurrent may be stopped by applying a negative potential to anode w. It is having different values for different metals. The only option more than or equal to energy of 1 eV is 2 eV. Answer Detailed Solution Below Option 4 : Answer Detailed Solution Below Option 2 : 0. Concept: Compton Scattering: It is the scattering of a photon by a charged particle usually an electron.
Cathode ray particles are electrons. Cathode ray particles start from anode and move towards cathode. In the absence of electrical and magnetic fields, cathode rays travel in straight lines. Television picture tubes are cathode ray tubes. Photoelectric effect ppt. Slideshare ppt. Related Books Free with a 30 day trial from Scribd. Related Audiobooks Free with a 30 day trial from Scribd. Harshitha Babu. Rollie Manigao. Reena Shaktawat. Mukheem Mohammad.
MoHamed Elsayed. Self-employed at Self-employed. Show More. Views Total views. Actions Shares. No notes for slide. Photoelectric Effect 1. How Einstein really became famous! In the left part of the application window there is the possibility to enable graphical representation of current versus battery voltage, current versus light intensity and the electron energy versus light frequency.
Photoelectric Effect has plenty of controls to closely observe the effects of the experiment under various conditions. The application is great for educational purposes as it provides a visual, animated representation of the photoelectric effect. The Photoelectric Effect.
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