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प्रश्न
Name the factors on which photoelectric emission from a surface depends.
उत्तर
Factors on which photoelectric emission from a surface depends:
- Frequency of light
- Intensity of light
- Photosensitivity of the material
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
(a) maximum kinetic energy of the emitted electrons,
(b) Stopping potential, and
(c) maximum speed of the emitted photoelectrons?
Why should gases be insulators at ordinary pressures and start conducting at very low pressures?
How does one explain the emission of electrons from a photosensitive surface with the help of Einstein's photoelectric equation?
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?
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.
Emission of electrons by the absorption of heat energy is called ____________ emission.
In which case is electron emission from a metal not known?
Give an example each of a metal from which photoelectric emission takes place when irradiated by
- UV light
- visible light.
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.
