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18 votes

How can photons interact with nuclei?

While it is true that being small relative to wavelength tends to reduce an objects interaction with waves, there's no absolute restriction. You can, for example, buy a wristwatch that sets itself ...
John Doty's user avatar
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9 votes

How can photons interact with nuclei?

It is better to think of this in terms of the characteristic energy scales involved. The outermost electron orbitals of for example a transition metal have energies of order ~several electron volts, ...
niels nielsen's user avatar
1 vote

Why is the shorter the wavelength, the smaller the object you can image? and vice-versa?

You can see it from the Rayleigh criterion or the resolution limit. For a classical optical microscope, the image of a point, $\delta(x,y)$, located in the object plane, isn't a point in the image ...
MauvaiseFoi's user avatar
1 vote

Natural Harmonics on a String

Is there some way to choose the initial conditions so that something more simple is obtained, for example, so that only the low order terms are kept? All terms die down in time after the string is ...
Ján Lalinský's user avatar

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