Are rays photonbeams?

Jan 2013
Why beyond microwaves the EM waves seems not to follow the Huygens rule but behave as directable rays?
Below a wavelenght located between microwaves & infrared rays EM radiation behave rather as directable rays than waves following the Huygens rule.What else a ray is if not a particle's linear orbit?
Last edited:


Apr 2008
Bedford, England
Please avoid double posting.
If you want to add information to an existing post either submit a "reply" to it,
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I think that the change you are describing is more apparent than real.
As the wavelength changes, the scale of the observed phenomena also changes.
Thus while the width of a light ray might be typically measured in millimetres,
a Radio Wavelength "Ray" might be several tens of kilometres wide,
in other words it wouldn't look much like a ray.