Threshold frequency in photoelectric effect is the minimum frequency of electromagnetic radiation which is required for the phenomenon of photoelectric emission to occur from a metal surface. It is a characteristic of electromagnetic radiation (light in case of photoelectric emission) and not metal.
How do you use the threshold wavelength to find the threshold frequency?
To Find: Threshold wavelength of metal = λ o =? The frequency of incident light is less than the threshold frequency . No photoelectrons will be emitted from the metal surface. Ans: The incident frequency is 4.41 x 10 14 Hz and the threshold frequency is 5.79 x 10 14 Hz, and no photoelectron will be ejected.
How can you calculate the threshold frequency of a photoelectric material?
The formula of threshold frequency is W= hv 0 . Here v 0 is the photoelectric threshold frequency of the electromagnetic light rays, W is the work function of the metal body.
How do you calculate threshold energy?
(E=hv) – threshold energy = (Ek= 1/2me-ve^2) or exactly like the one you posted. Threshold energy is the amount of energy it takes to remove an electron from a metallic surface, just like the work function.
What is threshold frequency formula?
The formula of threshold frequency is W= hv 0 . Here v 0 is the photoelectric threshold frequency of the electromagnetic light rays, W is the work function of the metal body.
What is the threshold frequency?
: the minimum frequency of radiation that will produce a photoelectric effect
What is the formula for photoelectric effect?
The photoelectric effect is the process in which EM radiation
What is Q value in physics?
In nuclear physics and chemistry, the Q value for a reaction is the amount of energy absorbed or released during the nuclear reaction . The value relates to the enthalpy of a chemical reaction or the energy of radioactive decay products.
What is the threshold value?
[′thresh‚hōld ‚val·yü] (computer science) A point beyond which there is a change in the manner a program executes ; in particular, an error rate above which the operating system shuts down the computer system on the assumption that a hardware failure has occurred.
What is the symbol of threshold frequency?
The photoelectric threshold frequency, symbolized by the Greek letter nu with subscript zero, ν 0 , is that frequency at which the effect is barely possible; it is given by the ratio of the work function symbolized by the Greek letter psi, ψ, to Planck’s constant (ν 0 =...
What happens threshold frequency?
The threshold frequency of a metal refers to the frequency of light that will cause an electron to dislodge from that metal . Light below a metal’s threshold frequency will not eject an electron. Light at the threshold frequency will dislodge the electron with no kinetic energy.
Is threshold frequency same for all metals?
Both the metals have the same stopping potential at different frequencies and this frequency is more than metal A. So, metal A has a higher threshold frequency. Thus, metal A has high threshold frequency.
What is threshold frequency in simple words?
: the minimum frequency of radiation that will produce a photoelectric effect
Which metal has highest threshold?
Which metal has the highest threshold frequency? At zero stopping potential the frequency of incident radiation is more to metal A . Both the metals have the same stopping potential at different frequencies and this frequency is more than metal A. So, metal A has a higher threshold frequency.
What is the threshold frequency for zinc?
The threshold frequency of radiation for zinc is 6·50 × 1014 Hz . (a) The zinc plate is initially negatively charged. A lamp is used to shine ultraviolet radiation of frequency 6·7 × 1014 Hz onto the zinc plate.
What is Einstein photoelectric equation?
Einstein assumed that a photon would penetrate the material and transfer its energy to an electron. ... By conservation of energy, this reasoning led Einstein to the photoelectric equation E k = hf − φ , where E k is the maximum kinetic energy of the ejected electron.
