To cause photoelectric emission from a metal surface, a minimum amount of energy is required to eject electron. Therefore, frequency of incident radiation must be equal to or greater than a minimum frequency. Class 12 Physics Chapter 11 Dual Nature ...
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(i) No electron will be emitted when illuminated by red light. (ii) Electron emission takes place with blue light. Class 12 Physics Chapter 11 Dual Nature of Radiation and Matter Session 2024-2025.
As stopping potential Vo = 1.5 V, hence maximum kinetic energy of the photoelectrons emitted Kmax = 1.5 eV. Class 12 Physics Chapter 11 Dual Nature of Radiation and Matter Session 2024-2025.
In photon picture of light, intensity of radiation is defined as the energy transferred to a surfac unit area per unit time by the photons striking on the surface. Its SI unit is watt/m² (W m²). Class 12 Physics Chapter ...
For a given photosensitive material and with a source of constant frequency v (v > vo) of incident radiation, the photocurrent increases with increase in intensity of incident light. Class 12 Physics Chapter 11 Dual Nature of Radiation and Matter ...