I was wondering why a laser beam diverges. If all the photons are in the same direction, I would imagine that it would stay that way over a long distance. I am aware that a perfectly collimated beam with no divergence cannot be created due to diffraction, but I am looking for an explanation based on photons rather than wave physics.
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Are C1, C2 and C3 connected in parallel, or C2, C3 in parallel and C1 in series with C23? Btw it appeared as a question in the basic physics...
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I have read the radiation chapter, where I have been introduced with the terms emissivity and absorptivity. emissivity tells about the abili...
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A charged particle undergoing an acceleration radiates photons. Let's consider a charge in a freely falling frame of reference. In such ...
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