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......If we consider a photon is its own antiparticle, then a photon should not be able to distinguish matter from antimatter. Is this correct?
On the other hand, the interaction between a photon and alanine should be indistinguishable from that of an antiphoton with antialanine. If we consider a photon is its own antiparticle, then a photon should not be able to distinguish matter from antimatter.
I would guess that it would have the opposite effect because each of the bonds would have polarity of equal magnitude and opposite direction
to what extent is a photon its own antiparticle?Does the "anti" version have the same spin?
If converting a photon to its antiparticle reverses its spin (andI don't know if it does or not) then you would get round this
It is true that the polarity is exactly opposite, but light isn't just an oscillating electric field. The magnetic component also interacts, and the antiparticles will have the opposite magnetic influence as well as opposite charges, so the combination results in identical interaction with light. Nifty!
Chiral samples rotate linearly polarized light because the two different circularly polarized lights (that the linearly polarized light can be decomposed into) will experience different refractive indices, different absorptivities etc. through interaction with the chiral sample.
Can you get "rotation of the plane of polarised light" with a single photon?That rotation is a relative phase shift between left and right handed spins.
Quote from: Bored chemist on 21/06/2015 20:05:13Can you get "rotation of the plane of polarised light" with a single photon?That rotation is a relative phase shift between left and right handed spins.I don't think so. I suppose I have been mixing the logic of single interactions with that of interacting populations, which may have helped confuse myself and others (oops!).
a "racemic mixture" is a chemist's term for talking about a precisely 50/50 mixture of right-handed and left-handed versions of a compound (and I extended it to discuss photons).
My guess is heads/tails mechanism (equal probability of forming either), and given the large number of photons usually considered, 50-50 mix is practically guaranteed.