What is the work function of sodium metal if the photoelectric threshold wavelength is 680 nm?
2.3 eV
The threshold wavelength of sodium metal is 6800Å. Compute the work function. Work function of sodium is 2.3 eV .
What is the work function of sodium?
The work function of sodium metal is 4.41 × 10–19J.
What is threshold frequency and work function in photoelectric effect?
Threshold Frequency: The threshold frequency is that minimum frequency of light below which the photoelectrons do not emit. Work function: The least energy which can eject the electrons from the surface of the metal.
Is sodium has a work function of 2.75 eV?
The Work Function Of Sodium,Φ = 2.75eV. In photoelectric, the photon energy incident on the surface of the metal is equal to the sum of the work function of the metal and the maximum kinetic energy of the electron.
What is the threshold frequency of sodium?
4.40×1014 Hz
Sodium metal has a threshold frequency of 4.40×1014 Hz.
What is the threshold wavelength of sodium?
Threshold wavelength for photoelectric effect on sodium is 5000 Å.
What is the work function of sodium in electron volt?
Work function of sodium is 2.3 eV .
What is work function threshold frequency?
The minimum energy needed for photo-emission of the electrons is called work function. The work function depends on the material. The minimum value of the frequency of light to give the work function is called the threshold frequency.
What is the work function in photoelectric effect?
The photoelectric work function is the minimum photon energy required to liberate an electron from a substance, in the photoelectric effect. If the photon’s energy is greater than the substance’s work function, photoelectric emission occurs and the electron is liberated from the surface.
What is the formula of threshold frequency?
f = W/h where h is planck’s constant. Therefore if we know the work fucntion we can work out the threshold frequency but don’t forget to convert 3eV into J. 1eV = 1.6 x 10^{-19} J.
What is threshold frequency in photoelectric effect?
Threshold Frequency (γth) It is the minimum frequency of the incident light or radiation that will produce a photoelectric effect i.e. ejection of photoelectrons from a metal surface is known as threshold frequency for the metal. It is constant for a specific metal but may be different for different metals.
How do you find the threshold wavelength of a work function?
The frequency of the light for which its energy is equal to the work function is called threshold frequency ν0. Therefore, ϕ=hν0. Let us use the relation between the frequency and the wavelength of light, i.e. ν=cλ. When the light wave has threshold frequency, its wavelength is called threshold wavelength (λ0).
What is the threshold frequency for photoelectric effect on sodium?
The threshold frequency for photoelectric effect on sodium corresponds to a wavelength of 5000 Å. Its work function is x 1019 J (d) 3 x 10-19 J Login Remember Register Test JEE NEET Home Q&A Unanswered Ask a Question Learn Ask a Question The threshold frequency for photoelectric effect on sodium corresponds to a wavelength of 5000 Å.
What is the work function of sodium in photoelectric emission?
The work function for sodium is 1.82 eV. Find (a) the energy of the photons causing photoelectric emission. (b) the quantum numbers of the two levels involved in the emission of these photons. (d) the recoil speed of the emitting atom assuming it to be at rest before the transition.
What is the photoelectric effect?
The emission of electrons with help of electromagnetic radiations like light from the surface of a photoelectric material is called the photoelectric effect. The electrons emitted are known as photoelectrons.
What is the kinetic energy of the fastest photo-electrons emitted from sodium?
The kinetic energy of the fastest photo-electrons emitted from sodium is 0.73 eV. The work function for sodium is 1.82 eV. Find (a) the energy of the photons causing photoelectric emission.