Light of wavelength 500 nm is incident on a metal with work function 2.28 eV. The de Broglie wavelength of the emitted electron is
Options
(a) ≥2.8×10⁻⁹ m (b) ≤2.8×10⁻¹² m (c) < […]
A photoelectric surface is illuminated successively by monochromatic light of wavelength λ and λ/2. If the maximum kinetic energy of the emitted photoelectrons in the second case is 3 times that in the first case, […]
Which of the following figures represent the variation of particle momentum and the associated de-Broglie wavelength?
Options
(a)
(b)
(c)
(d)
Correct Answer:
(a)
Explanation:
The de-Broglie wavelength is given […]
A radiation of energy ‘E’ falls normally on a perfectly reflecting surface. The momentum transferred to the surface is (c= velocity of light)
Options
(a) E/c (b) 2E/c (c) 2E/c² (d) E/c²
Correct […]
A certain metallic surface is illuminated with monochromatic light of wavelength λ. The stopping potential for photoelectric current for this light is 3V₀. If the same surface is illuminated with light of wavelength 2λ, the […]
If the kinetic energy of the particle is increased to 16 times its previous value, the percentage change in the de-broglie wavelength of the particle is
Options
(a) 25 (b) 75 (c) 60 […]
Which phenomenon best supports the theory that matter has a wave nature?
Options
(a) Electron momentum (b) Electron diffraction (c) Photon momentum (d) Photon diffraction
Correct Answer:
Electron diffraction
Explanation:
Wave nature of matter […]
The threshold wavelength for photoelectric emission from a material is 4800 Å. Photoelectrons will be emitted from the material, when it is illuminated with light from a
Options
(a) 40 W blue lamp […]
If an electron and a proton have the same de-Broglie wavelength, then the kinetic energy of the electron is
Options
(a) More than that of a proton (b) Equal to that of a […]
The maximum kinetic energy of emitted electrons in a photoelectric effect does not depend upon
Options
(a) Intensity (b) Work function (c) Wavelength (d) Frequency
Correct Answer:
Intensity
Explanation:
The maximum kinetic energy = […]
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