Advertisements
Advertisements
प्रश्न
The threshold wavelength for a metal surface whose photoelectric work function is 3.313 eV is __________.
विकल्प
4125 Å
3750 Å
6000 Å
2062.5 Å
उत्तर
The threshold wavelength for a metal surface whose photoelectric work function is 3.313 eV is 3750 Å.
APPEARS IN
संबंधित प्रश्न
In photoelectric emission, a radiation whose frequency is 4 times threshold frequency of a certain metal is incident on the metal. Then the maximum possible velocity of the emitted electron will be
A light of wavelength 500 nm is incident on a sensitive metal plate of photoelectric work function 1.235 eV. The kinetic energy of the photoelectrons emitted is (Take h = 6.6 × 10–34 Js)
The work functions for metals A, B and C are 1.92 eV, 2.0 eV and 5.0 eV respectively. The metal/metals which will emit photoelectrons for a radiation of wavelength 4100Å is/are
What is a surface barrier?
Briefly discuss the observations of Hertz, Hallwachs and Lenard.
Explain the effect of potential difference on photoelectric current.
Explain the quantum concept of light.
Explain experimentally observed facts of the photoelectric effect with the help of Einstein’s explanation.
List out the characteristics of photons.
When a 6000 Å light falls on the cathode of a photo cell, photoemission takes place. If a potential of 0.8 V is required to stop emission of electron, then determine the
- frequency of the light
- energy of the incident photon
- work function of the cathode material
- threshold frequency and
- net energy of the electron after it leaves the surface.
