a colleague asked my why photons are seldom, if ever, mentioned in the context of radio waves. It seems to be an interesting question. On one hand, it is clear that radio waves can be understood as very low-energy photons (lVERY arge wavelength when compared with visible light). On the other hand, one could think that radio waves do not easily exhibit their photon-like nature. Are there experiments which could be used to empirically show that radio waves are photons (not a good expression but you know what I mean...) in the same way as light is? For instance, how to observe the photoelectric effect or the Compton effect with very low-energy photon?
My guess is that almost everything one wants to do with radio waves can be done using Maxwell's theory of electromagnetism.
Any thoughts?
Regards,
Antti Savinainen
Finland
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