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Gerlan Silva
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The existence of a frequency threshold in the photoelectric effect is often regarded as the strongest objection to the wave theory. Because?
Gerlan Silva said:The existence of a frequency threshold in the photoelectric effect is often regarded as the strongest objection to the wave theory.
The effect of the photoelectric effect is not observed below a certainPeterDonis said:Can you give a specific reference that makes this claim?
Gerlan Silva said:The effect of the photoelectric effect is not observed below a certain
Frequency threshold is a consequence of a photon energy having to be equal to
or greater than the true work
This issue that I posted is Eisberg's quantum physics. P 79PeterDonis said:This isn't what I asked for. I asked for a reference--a link to a textbook or a peer-reviewed paper that makes the claim you say is "often" made.
Plus, it seems like you have answered the very question you asked in the OP. What exactly is the issue you are asking about?
Gerlan Silva said:Eisberg's quantum physics
yes.PeterDonis said:
Why should there be any objection to "the wave theory", whatever you mean by it. If you mean light as an electromagnetic wave, there's certainly nothing to object against it. The photoelectric effect at the level of Einstein's original (and outdated!) paper of 1905 is (as most of macroscopic optics) in the semiclassical approximation, i.e., describing the em. field as classical and the (charged) matter by quantum theory:Gerlan Silva said:The existence of a frequency threshold in the photoelectric effect is often regarded as the strongest objection to the wave theory. Because?
Gerlan Silva said:The existence of a frequency threshold in the photoelectric effect is often regarded as the strongest objection to the wave theory. Because?
vanhees71 said:Why should there be any objection to "the wave theory", whatever you mean by it.
ZapperZ said:if the frequency is above threshold, even at extremely low intensity (for a wave, this means at very low amplitude of oscillation), one will get electron emission.
The frequency threshold in the photoelectric effect refers to the minimum frequency of incoming light that is required to eject an electron from a metal surface. This threshold frequency is unique to each metal and is determined by its work function.
If the frequency of the incoming light is below the threshold frequency, no electrons will be ejected regardless of the intensity of the light. However, if the frequency is above the threshold, the number of ejected electrons will increase with increasing frequency and intensity of the light.
At frequencies below the threshold, the ejected electrons will have zero kinetic energy. As the frequency increases above the threshold, the energy of the ejected electrons will also increase. This is because the excess energy from the incoming light is transferred to the electrons, giving them kinetic energy.
The frequency threshold is a characteristic property of a specific metal and cannot be altered. It is determined by the work function of the metal, which is the minimum amount of energy required to remove an electron from its surface. However, the threshold can be affected by external factors such as temperature and surface conditions.
The frequency threshold is a crucial factor in the photoelectric effect as it determines whether or not electrons will be ejected from a metal surface by incoming light. It also illustrates the particle-like behavior of light, as only photons with enough energy (frequency) can cause the ejection of electrons from a metal surface.