Advertisements
Advertisements
प्रश्न
Why photoelectric effect cannot be explained on the basis of wave nature of light? Give reasons.
Advertisements
उत्तर
Wave nature of radiation cannot explain the following:
(i) The instantaneous ejection of photoelectrons.
(ii) The existence of threshold frequency for a metal surface.
(iii) The fact that kinetic energy of the emitted electrons is independent of the intensity of light and depends upon its frequency.
Thus, the photoelectric effect cannot be explained on the basis of wave nature of light.
APPEARS IN
संबंधित प्रश्न
Find the de Broglie wavelength of a neutron, in thermal equilibrium with matter, having an average kinetic energy of `(3/2)` kT at 300 K.
Crystal diffraction experiments can be performed using X-rays, or electrons accelerated through appropriate voltage. Which probe has greater energy? (For quantitative comparison, take the wavelength of the probe equal to 1 Å, which is of the order of inter-atomic spacing in the lattice) (me = 9.11 × 10−31 kg).
Obtain the de Broglie wavelength of a neutron of kinetic energy 150 eV. As you have an electron beam of this energy is suitable for crystal diffraction experiments. Would a neutron beam of the same energy be equally suitable? Explain. (mn= 1.675 × 10−27 kg)
When a light wave travels from air to glass ______.
A proton, a neutron, an electron and an α-particle have same energy. Then their de Broglie wavelengths compare as ______.
Relativistic corrections become necessary when the expression for the kinetic energy `1/2 mv^2`, becomes comparable with mc2, where m is the mass of the particle. At what de Broglie wavelength will relativistic corrections become important for an electron?
- λ = 10 nm
- λ = 10–1 nm
- λ = 10–4 nm
- λ = 10–6 nm
Who proposed that moving particles such as electrons and protons also possess wave character?
Which relation gives the de Broglie wavelength of a particle with momentum \[p\]?
What value of Planck's constant is used in the de Broglie wavelength calculations?
What prevents detection of the ball's wave nature?
