An alpha particle and a proton are accelerated from rest through the same potential difference V. Find the ratio of de-Broglie wavelengths associated with them.
The following graph shows the variation of stopping potential V0 with the frequency ν of the incident radiation for two photosensitive metals X and Y:
(i) Which of the metals has larger threshold wavelength? Give reason.
(ii) Explain giving reason, which metal gives out electrons, having larger kinetic energy, for the same wavelength of the incident radiation.
(iii) If the distance between the light source and metal X is halved, how will the kinetic energy of electrons emitted from it change? Give reason
(i) Let = Frequency of incident radiations of metal Y
= Frequency of incident radiations of metal X
Therefore, metal X has larger threshold wavelength.
(ii) Since the kinetic energy of the emitted electrons is directly proportional to the frequency of incident radiation, metal Y having larger incident frequency will have larger kinetic energy.
∴ Metal Y has larger kinetic energy.
(iii) Kinetic energy of the emitted photoelectrons is independent of the intensity of the incident light. Hence, kinetic energy of the emitted photoelectrons remains unchanged if the distance between the light source and metal X is halved.
in this in (ii) part why work function.is not considered kindly reply fast... ??
Sir,plz explain Davisson Germer experiment?
What is quantum theory?
write the laws of photoelectric effect by using Einstein's photo electric equations.
What si the conclusion of Davisson and Germer experiment?
Define intensity of radiation on the basis of photon picture of light. Write its SI unit.
Plzz tell the answer pah...
The wavelength lambda , of a photon & the de-broglie wavelength of an electron have the same value.show that the energy of the photon is (2*lambda*m*c)/h times the kinetic energy of the electron, where m,c,h have their usual meanings..
explain the photovoltaic cells and photoconductive cells
The work function of caesium is 2.14eV.find a)threshold frequency.b) the wavelength of incident light if the photocurrent is brought to zero by a stopping potential of 0.60v
What is the shortest wavelength present in the Paschen series of spectral lines?
Given that photon of light of wavelength 10000 Ao has an energy equal to 1.23 eV. When a light of wavelength 5000Ao adn intnsity I falls on photoelectric cell, the surface current is 0.40 X 106 A. Stopping potential is 1.36eV, then what is the work function? (1 Ao = 10-10m)
define intensity of light?
If the frequency of incident light on a metal surface is doubled for the same intensity . What is the change observed in Kinetic Energy of the photoelectrons emitted?
An alpha particle and a proton are accelerated from rest through the same potential difference V. Find the ratio of de-Broglie wavelengths associated with them.
The following graph shows the variation of stopping potential V0 with the frequency ν of the incident radiation for two photosensitive metals X and Y:
(i) Which of the metals has larger threshold wavelength? Give reason.
(ii) Explain giving reason, which metal gives out electrons, having larger kinetic energy, for the same wavelength of the incident radiation.
(iii) If the distance between the light source and metal X is halved, how will the kinetic energy of electrons emitted from it change? Give reason
(i) Let
= Frequency of incident radiations of metal Y
Therefore, metal X has larger threshold wavelength.
(ii) Since the kinetic energy of the emitted electrons is directly proportional to the frequency of incident radiation, metal Y having larger incident frequency will have larger kinetic energy.
∴ Metal Y has larger kinetic energy.
(iii) Kinetic energy of the emitted photoelectrons is independent of the intensity of the incident light. Hence, kinetic energy of the emitted photoelectrons remains unchanged if the distance between the light source and metal X is halved.
in this in (ii) part why work function.is not considered kindly reply fast... ??
Sir,plz explain Davisson Germer experiment?
What is quantum theory?
write the laws of photoelectric effect by using Einstein's photo electric equations.
What si the conclusion of Davisson and Germer experiment?
of light incident on the surface changes from lambda1 to lambda2. Derive the expressions for the
threshold wavelength lambdao and work function for the metal surface.
Define intensity of radiation on the basis of photon picture of light. Write its SI unit.
Plzz tell the answer pah...
The wavelength lambda , of a photon & the de-broglie wavelength of an electron have the same value.show that the energy of the photon is (2*lambda*m*c)/h times the kinetic energy of the electron, where m,c,h have their usual meanings..
explain the photovoltaic cells and photoconductive cells
The work function of caesium is 2.14eV.find a)threshold frequency.b) the wavelength of incident light if the photocurrent is brought to zero by a stopping potential of 0.60v
What is the shortest wavelength present in the Paschen series of spectral lines?
Given that photon of light of wavelength 10000 Ao has an energy equal to 1.23 eV. When a light of wavelength 5000Ao adn intnsity I falls on photoelectric cell, the surface current is 0.40 X 106 A. Stopping potential is 1.36eV, then what is the work function? (1 Ao = 10-10m)
define intensity of light?
If the frequency of incident light on a metal surface is doubled for the same intensity . What is the change observed in Kinetic Energy of the photoelectrons emitted?