Are Photons Bigger Than Electrons?

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SUMMARY

The discussion clarifies that electron microscopes are preferred over visible light microscopes due to the diffraction limitations of light. Photons, which have no mass and are often misunderstood in terms of size, have a wavelength of approximately 500nm, causing significant blurring in imaging small objects. In contrast, electrons exhibit wave-like behavior with much smaller wavelengths, resulting in reduced diffraction and clearer images. The conversation emphasizes the importance of using the wave model of light for better understanding rather than focusing on the concept of photon size.

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noname2020x
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I was told by a professor that electron microscopes are used instead of visible microscopes because photos are too big and make the picture blurry where are electrons are so small that they give detail. Considering photos don't really have a size, and have no mass, I don't understand this. Why do we use electron microscopes?
 
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It's not the "size of photons" that counts. They have no actual extent (in many people's view, at least). The important thing is that the wavelength of visible light (500nm region) is so long that light will diffract noticeably and blur the detail too much to see anything. The wavelength of a moving electron (yes, they too behave like waves) is much smaller and so the effects of diffraction are less and small objects are less blurred.
It is wise to avoid trying to apply the photon nature of light to every problem, willy-nilly. It only makes life hard and the wave model can often work a lot better.
 
got it, makes perfect sense. Not sure why I didn't think about that.

Thanks
 

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