Advertisements
Advertisements
प्रश्न
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
पर्याय
A only
both A and B
all these metals
none
Advertisements
उत्तर
both A and B
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
The threshold wavelength for a metal surface whose photoelectric work function is 3.313 eV is __________.
How does photocurrent vary with the intensity of the incident light?
Give the definition of intensity of light according to quantum concept and its unit.
Briefly discuss the observations of Hertz, Hallwachs and Lenard.
Explain how frequency of incident light varies with stopping potential.
Explain experimentally observed facts of the photoelectric effect with the help of Einstein’s explanation.
List out the characteristics of photons.
How many photons per second emanate from a 50 mW laser of 640 nm?
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.
