All Questions
5
questions
0
votes
1
answer
127
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de Broglie wavelength for particles with mass [duplicate]
is $p=\frac{h}{\lambda}$ only true for massless particles? because generally $E=\sqrt{p^2c^2+m^2c^4}$, then if we equate it to $h\nu$ we get $$p=\sqrt{\frac{h^2}{\lambda^2}-m^2c^2}\neq\frac{h}{\lambda}...
- 1,038
1
vote
1
answer
594
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Casimir effect and negative mass
The Casimir effect causes a limited number of wave functions, causing fewer particles between plates than outside and this could be considered as a negative mass. Then, if we have a technology good ...
- 254
40
votes
12
answers
13k
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Does information have mass?
Does information itself have any detectable mass? If so, how is the mass of information measured if at all possible? Mathematically, is it possible for information itself to have mass? What would be ...
- 659
1
vote
0
answers
38
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How can a photon exist on its own without a mass? [duplicate]
For example, thermal energy exists and has no mass, but is carried by particles which have mass. A photon is described as a particle - how can a photon exist on its own, travel in space and even push ...
- 43
21
votes
4
answers
4k
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Why do we need high energy to explore small dimensions?
I am taking a quantum physics class, and for the life of me, I can not remember why we would need a vast amount of energy to understand the microscopic universe.
