Advertisements
Advertisements
Question
Name the factors on which photoelectric emission from a surface depends.
Advertisements
Solution
Factors on which photoelectric emission from a surface depends:
- Frequency of light
- Intensity of light
- Photosensitivity of the material
RELATED QUESTIONS
Why should gases be insulators at ordinary pressures and start conducting at very low pressures?
Would you prefer a material with a high melting point or a low melting point to be used as a cathode in a diode?
Would you prefer a material with a high work-function or a low work-function to be used as a cathode in a diode?
The cathode of a diode valve is replaced by another cathode of double the surface area. Keeping the voltage and temperature conditions the same, will the place current decrease, increase or remain the same?
The anode of a thermionic diode is connected to the negative terminal of a battery and the cathode to its positive terminal.
Answer the following question.
Define the term "Threshold frequency", in the context of photoelectric emission.
The wavelength λe of an electron and λp of a photon of same energy E are related by ______.
What do you mean by electron emission? Explain briefly various methods of electron emission.
Consider Figure for photoemission.
How would you reconcile with momentum conservation? Note light (photons) have momentum in a different direction than the emitted electrons.
The work function of a metal is 2.31 eV. Photoelectric emission occurs when the light of frequency 6.4 × 1014 Hz is incident on the metal surface. Calculate
- the energy of the incident radiation,
- the maximum kinetic energy of the emitted electron and
- the stopping potential of the surface.
