1 vote
Accepted

Light accelerating instantaneous or not at all?

Any massless particle, like a photon or gluon, can only travel at c. It can never have zero speed or exist at zero speed. So there is no acceleration and it is not appropriate to think about ...
foolishmuse's user avatar
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1 vote

Why diffraction works at sharp edges?

Here's another way of visualizing Farcher's point. We take the case of diffraction happening at the edges of a slit in a thin razor blade: When struck by an incoming plane wave, the corner at the edge ...
niels nielsen's user avatar
1 vote

Why diffraction works at sharp edges?

Imagine a plane wave passing an edge. Geometrical optics predicts that after the edge is passed there is a region where plane waves exists and a region (shadow) were there are no waves and that there ...
Farcher's user avatar
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