(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.
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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 ...
Number of photons incident per unit area per unit time on a surface governs the intensity of light Class 12 Physics Chapter 11 Dual Nature of Radiation and Matter Session 2024-2025.
Threshold frequency of a material is the minimum frequency of incident radiation needed to cause photoelectric emission from the surface of that material. Class 12 Physics Chapter 11 Dual Nature of Radiation and Matter Session 2024-2025.
The minimum amount of energy required to just eject an electron from a given metal surface is called the work function for that metal surface. Class 12 Physics Chapter 11 Dual Nature of Radiation and Matter Session 2024-2025.
Phenomenon of photoelectric effect shows the quantum nature of electromagnetic radiation. Class 12 Physics Chapter 11 Dual Nature of Radiation and Matter Session 2024-2025.
In photoelectric effect, the stopping potential is the least value of negative potential to be applied in a photoelectric tube for which photoelectric current becomes zero. Class 12 Physics Chapter 11 Dual Nature of Radiation and Matter Session 2024-2025.
Metal B having higher work function of 5 eV will have a lower threshold wavelength. Class 12 Physics Chapter 11 Dual Nature of Radiation and Matter Session 2024-2025.