Advertisements
Advertisements
प्रश्न
The wavelength λe of an electron and λp of a photon of same energy E are related by ______.
पर्याय
λp ∝ λe
`λ_p ∝ sqrt(lambda_e)`
`λ_p ∝ 1/sqrt(lambda_e)`
`λ_p ∝ lambda_e^2`
Advertisements
उत्तर
The wavelength λe of an electron and λp of a photon of same energy E are related by `bbunderline(lambda_p prop lambda_e^2)`.
संबंधित प्रश्न
The work function of caesium metal is 2.14 eV. When light of frequency 6 × 1014 Hz is incident on the metal surface, photoemission of electrons occurs. What is the
- maximum kinetic energy of the emitted electrons,
- Stopping potential, and
- maximum speed of the emitted photoelectrons?
How will the thermionic current vary if the filament current is increased?
Would you prefer a material with a high work-function or a low work-function to be used as a cathode in a diode?
An isolated metal sphere is heated to a high temperature. Will it become positively charged due to thermionic emission?
Why does thermionic emission not take place in non-conductors?
Define the term "Threshold frequency", in the context of photoelectric emission.
Answer the following question.
Define the term "Threshold frequency", in the context of photoelectric emission.
The work function of aluminum is 4⋅2 eV. If two photons each of energy 2⋅5 eV are incident on its surface, will the emission of electrons take place? Justify your answer.
Define the work function of a metal. Give its unit.
In which case is electron emission from a metal not known?
