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w=hf
w-work funtion
h-constant
f-threshold frequency
the work funtion is the minimum energy required to remove the electrons on the metal
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What is the difference between work function and threshold frequency?
The threshold frequency is the minimum frequency of radiation required to raise the potential energy of the most energetic electrons in a metal to zero, therefore giving the free electron (once emitted) a velocity of zero. The work function of a metal surface is the energy required to remove the most energetic electron from it. Each metal has a different work function, with the negative of this the maximum potential of the de-localised electrons in the metal. W=hf0 The formula: Kmax = hf - W (in Joules) gives the maximum kinetic energy of the electron. As h is Planck's constant, and f is the frequency provided to the metal (ie. frequency of the electromagnetic wave that had irradiated the metal), and W is the Work Function of the metal, if the frequency provided to the metal is the threshold frequency, then the electron has kinetic energy of zero. However, if more than the threshold frequency is provided, the electron will have a kinetic energy > 0. I hope that's explained okay! Bec
Why do all photoelectrons not come with the same kinetic energy?
Some energy is lost in releasing the electrons from the nucleus. This energy is known as the work function, which relates to the threshold frequency. Therefore, the kinetic energy of the released photoelectron is equal to the photon energy minus the work function.
What is photo electric work function?
the energy used by sun to throw electrons (based on thersold frequency) is called work function
How does the work done relate to energy?
Basically, work can be thought of as a transfer of energy.
If the frequency of ultraviolet light is 2.53 x 10 power of -7 plancks constant is 6.63 x 10 power of -34 and the work function is 3.6eV what is the maximum kinetic energy?
you need units
What is the threshold frequency in a photoelectric experiment is most closely related to?
The work function of the photoemissive metal.
What is the difference between work function and threshold frequency?
The threshold frequency is the minimum frequency of radiation required to raise the potential energy of the most energetic electrons in a metal to zero, therefore giving the free electron (once emitted) a velocity of zero. The work function of a metal surface is the energy required to remove the most energetic electron from it. Each metal has a different work function, with the negative of this the maximum potential of the de-localised electrons in the metal. W=hf0 The formula: Kmax = hf - W (in Joules) gives the maximum kinetic energy of the electron. As h is Planck's constant, and f is the frequency provided to the metal (ie. frequency of the electromagnetic wave that had irradiated the metal), and W is the Work Function of the metal, if the frequency provided to the metal is the threshold frequency, then the electron has kinetic energy of zero. However, if more than the threshold frequency is provided, the electron will have a kinetic energy > 0. I hope that's explained okay! Bec
How to Calculate the work function?
work function = planck's constant x threshold frequency w=h(ft) it also equals the energy(eV) Planck's constant(h) = 6.626 x 10-34
Why do all photoelectrons not come with the same kinetic energy?
Some energy is lost in releasing the electrons from the nucleus. This energy is known as the work function, which relates to the threshold frequency. Therefore, the kinetic energy of the released photoelectron is equal to the photon energy minus the work function.
What is photo electric work function?
the energy used by sun to throw electrons (based on thersold frequency) is called work function
Can resonance work in tone detection?
Yes, resonance can work in tone detection. You tune the resonant circuit to the frequency you want to detect and follow it with an amplitude detector. Amplitude above your design threshold value means there is signal frequency within your passband. This is how the original crystal radio worked. The resonant frequency was the frequency of the radio station desired. All other frequencies (radio stations) were rejected by the bandpass filter.
Why is compton effect not observable with visible light?
in compton scattering it is necessary that the energy of the photon should be very much greater than binding energy of electron .. binding energy is equal to work function of metal . in most of metals , the threshold frequency is equal to that of ultravoilet light .that is why we do not observe comption effect with visible light.
The work function for sodium metal is 1.82 eV calculate the threshold frequency wavelength for sodium?
If this question is related to the photoelectric effect the answer should be as follows (but I have learned the work function for sodium is 2.35 eV) Photoelectric effect: Photon energy h f = W + KE h := Planck constant f:= freqency of emitted light W:= Work function in Joule 1.82 eV * 1.6*10-19 J/eV = 2.91 * 10-19J KE: kinetic energy of electrons that have been released from metal When f0 is threshold frequency: KE = 0 (photon energy h*f0 is just enough to free electrons but not to give them kinetic energy) h*f0 = W f0 = W/h = 2.91 * 10-19J / 6.63*10-34 Js = 4.39 * 1014 Hz wavelength = c / f0 = 3.0 * 108 m/s / 4.39 * 1014 Hz = 6.84 * 10-7 m = 684 nm
Why polysilicon is used as gate in mos technology?
Because of threshold voltage reduction of MOSFETs. Comparing with metals for the gate of MOSFETs, polysilicon has small work function difference with the substrate silicon of MOSFETs.
The binding energy of electrons in a metal is 178kJ per mol what is the threshold frequency?
use the formula E=hv where v is the threshold frequency.however, the binding energy is in kJ per mol. convert it into J per atom.178kJ times 1000 = 178000 J and then divide by Avogadro's number (6.022*10E23)after that u just plug the number in equation wher h is planck's constant (6.626*10E-34 J*S) and solve for v (frequency)this will definitely work.
How hard you work your muscles is called frequency?
No, frequency is about how often.
What is the thresh hold frequency of cesium?
The function of a photoelectric material is the energy that a photon of light must possess to just expel an electron from the surface of a material. The work function of cesium is 3.42 x 10^-19 Joules.Ê
