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प्रश्न
point out any two characteristic properties of photons on which Einstein’s photoelectric equation is based ?
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उत्तर
The two characteristic properties of photons on which this equation is based are as follows:
(i) Photons have particle characteristic. It is emitted or absorbed in units called quanta of light.
(ii) Photons have wave characteristic. It travels in space with particular frequency, a characteristic of waves.
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संबंधित प्रश्न
Light of wavelength 488 nm is produced by an argon laser which is used in the photoelectric effect. When light from this spectral line is incident on the emitter, the stopping (cut-off) potential of photoelectrons is 0.38 V. Find the work function of the material from which the emitter is made.
Briefly explain the three observed features which can be explained by Einstein’s photoelectric equation.
Define the terms (i) ‘cut-off voltage’ and (ii) ‘threshold frequency’ in relation to the phenomenon of photoelectric effect.
Using Einstein’s photoelectric equation shows how the cut-off voltage and threshold frequency for a given photosensitive material can be determined with the help of a suitable plot/graph.
- In the explanation of photo electric effect, we assume one photon of frequency ν collides with an electron and transfers its energy. This leads to the equation for the maximum energy Emax of the emitted electron as Emax = hν – φ0 where φ0 is the work function of the metal. If an electron absorbs 2 photons (each of frequency ν) what will be the maximum energy for the emitted electron?
- Why is this fact (two photon absorption) not taken into consideration in our discussion of the stopping potential?
A photon of wavelength 663 nm is incident on a metal surface. The work function of the metal is 1.50 eV. The maximum kinetic energy of the emitted photoelectrons is ______.
What does \[\phi_0\] represent in Einstein’s photoelectric equation?
What does \[K_{\max}\] represent?
How is the work function related to the threshold frequency \[\nu_0\]?
How can maximum kinetic energy be written in terms of stopping potential \[V_0\]?
Which expression gives stopping potential \[V_0\] in terms of frequency?
