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.
Category: Class 12 Physics
NCERT Solutions for Class 12 Physics updated for CBSE academic session 2021-2022.
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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.
As per photon picture of light intensity of light is determined by the number of photons of a given frequency crossing per unit area per unit time. Class 12 Physics Chapter 10 Wave Optics 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.
Reflection and refraction both arise through interaction of incident light with the atomic constituents of matter. Atoms may be considered as oscillators which vibrate with the frequency of light. The frequency of light emitted by a charged oscillator equals its ...
A wavefront is defined as a surface of constant phase. Consider a plane surface XY separating a denser medium of refractive index n₁ from a rarer medium of refractive index n₂. Let c₁ and c₂ be the values of speed ...
The conservation law of energy holds good for the phenomenon of interference as well as diffraction. Due to interference or diffraction we obtain maxima and minima intensities at different points. From points of minima intensity the energy has been shifted ...