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.
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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.
No. Reduction in speed of light has no connection with energy carried by light wave. Energy carried by a wave depends only on its amplitude. Class 12 Physics Chapter 10 Wave Optics Session 2024-2025.
For blue light the angular width of central diffraction maximum is more than that for red light. Class 12 Physics Chapter 10 Wave Optics Session 2024-2025.
The fringe width is doubled because fringe width ‘ẞ’ is directly proportional to the distance of separation ‘D’ between the slits and screen. Class 12 Physics Chapter 10 Wave Optics Session 2024-2025.
Light sources which emit light waves of same wavelength (or frequency) having either zero or a constant originating phase difference are called coherent sources of light. Class 12 Physics Chapter 10 Wave Optics Session 2024-2025.