- #1
HtimsNats
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- TL;DR Summary
- Trying to sort out some missunderstandings about photons.
Hello!
I recently had a discussion with a person who's well-read on quantum physics and I was suprised by his claim that "light is in no sense regarded as a wave" in quantum mechanics.
His support for this claim was that there are no wave crest or wave trough, there is nothing moving. What matters is distance. What we call wavelength is the periodicity of the wavefunction of the photon. Half a wavelength is the distance for which negative self-interference occurs.
Futhermore, photons do not behave as waves in the sense that they follow the rule of superposition. What we observe is self-interference. As an example, it would be theoretically impossible to build an interferometer from two different lasers even if they had exactly the same wavelength, this is because the only interference we observe is self-interference, i.e. the interference of one photon with itself.
My questions for this thread is:
1. Is light, in any way, regarded as a wave in quantum theory?
2. Do you agree with the claims above?Lastly, sorry for my english, it's not my mother tongue.
I recently had a discussion with a person who's well-read on quantum physics and I was suprised by his claim that "light is in no sense regarded as a wave" in quantum mechanics.
His support for this claim was that there are no wave crest or wave trough, there is nothing moving. What matters is distance. What we call wavelength is the periodicity of the wavefunction of the photon. Half a wavelength is the distance for which negative self-interference occurs.
Futhermore, photons do not behave as waves in the sense that they follow the rule of superposition. What we observe is self-interference. As an example, it would be theoretically impossible to build an interferometer from two different lasers even if they had exactly the same wavelength, this is because the only interference we observe is self-interference, i.e. the interference of one photon with itself.
My questions for this thread is:
1. Is light, in any way, regarded as a wave in quantum theory?
2. Do you agree with the claims above?Lastly, sorry for my english, it's not my mother tongue.