A particle is easy because it is made up of an addition of wavelengths that, (Schrodinger like), localize the particle into a kind of 'packet'. And we cannot say exactly where the particle is because, well, its a collection of waves so of course we cannot say its at a certain 'point' Fine, no problems. But what about light of constant frequency? A constant frequency wave (eg red light) has a fixed momentum and as such we know its momentum exactly, therefore we can know nothing about its loaction. Imagine a sine wave of fixed wavelength going somewhere. This is the uncertainty principle. We cannot say, that the photon is 'a little bit of the wave' because we would need a length of the wave to take.(adsbygoogle = window.adsbygoogle || []).push({});

If we know its momentum exactly we cannot know its location. Fine, so when a 'photon' gets absorbed by a screen we can say nothing about its path? ALso, the photon time stands still, so from its point of view it took no time to get from slit to screen. Indeed a journey of a billion years would be no instant for the photon.

So, how can we visualize a photon 'packet' (rememeber its made of one frequency only)

No bluffing now......

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# What do photons look like?

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