All Questions
15
questions
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4
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274
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How does blackbody radiation suggest the quantization of energy?
I have read about Wein's law and Rayleigh-Jeans law which were apparently based on classical mechanics and couldn't explain the radiation spectrum of a blackbody.
Then Planck came up with the ...
- 1,305
1
vote
1
answer
71
views
Why is Wien's displacement law not discrete? [duplicate]
We are taught that the electrons emit electromagnetic waves/photons when transitioning from one quantum level to another in a discrete manner. This is what causes the spectral line of specific ...
- 43
0
votes
1
answer
55
views
Does the quantisation of energy apply to everything? [duplicate]
Radiation is quantised according to Planck, so that's out of the question. However, I have seen many simplifications that claim Planck introduced quantised energy. Period. Has Planck really done that? ...
- 359
-4
votes
3
answers
205
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Planck's quantum theory
Recently came across Planck's theory, $E = h\nu$.
It means that at any frequency, there is given energy. But I also saw that, $E$ can be $0, h\nu, 2h\nu, 3h\nu,...$.
How is it possible that energy can ...
- 31
0
votes
1
answer
170
views
If space is continuous, then frequency and photon energy too? [duplicate]
Photon is the quantum of light, i.e., energy comes in discrete level. But EM energy is a function of frequency ($E=hf$). And if frequency has a continuous spectrum, then energy level is continuous, ...
- 137
0
votes
1
answer
71
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Are there gaps present between lines in a continous line spectrum? [duplicate]
It might seem counter-intuitive for gaps to be formed in a "continuous spectrum", but according to Planck energy carried by a photon is quantised and can have only discrete values so ...
- 753
3
votes
3
answers
378
views
If frequency is continuous shouldn’t energy be non-quantised?
If $E=hf$ and the frequency of electromagnetic waves is continuous (i.e. you can have frequencies of $1.5\ Hz$ or $0.3\ Hz$ for example) then surely energy isn’t discrete or quantized into because one ...
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2
votes
2
answers
135
views
How does the Planck–Einstein relation imply discreteness?
The relation is often stated as $E = h\nu$
Simple enough. But the frequency $\nu$ doesn't have to be a natural number or even an integer, correct? It can be any rational number or even any real ...
3
votes
1
answer
112
views
Interplay of energy between photon, electronic energy levels and kinetic energy
I can understand that atoms have quantized energy levels for its electrons, but an atom's translational kinetic energy is continuous. As such, why is the absoprtion spectrum not continuous? That is to ...
- 840
2
votes
0
answers
182
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Is every kind of energy quantised? [duplicate]
I know this is been asked on this site before but I felt unsatisfied by its one answer.
I’m familiar with the concept of quantisation, I keep reading that “energy is quantised” but what do they mean ...
- 49
1
vote
1
answer
213
views
Where exactly does energy quantisation come in for light?
Planck quantised the energy of light in order to solve the black body radiation problem. However, I am confused as to exactly what he quantised. On one hand, I have seen that he quantised the energy ...
- 2,356
2
votes
3
answers
125
views
What was shocking in Einstein's partcile theory of light?
I know that when Einstein proposed the particle theory of light it was revolutionary and shocking for most of physicists and it took years to accept that view. Particle theory had been proposed in the ...
- 1,481
-3
votes
1
answer
63
views
Light was known to be a wave but had to be considered as made up of lumps not waves to explain ultraviolet catastrophe. Why? [duplicate]
Refer the title. Why was this required? How is this related to ultraviolet catastrophe?
- 565
-1
votes
1
answer
151
views
Does the continous EM spectrum contradict discrete energy? [duplicate]
After some research, it seems apparent to me that the EM spectrum is continuous, but this would contradict a physics fundamental that energy is discrete. Is there a conflict here?
- 4,711
-3
votes
2
answers
421
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Why do I not see evidence of discrete energy in the spectrum?
The electromagnet spectrum looks to be continuous, yet energy is discrete. Shouldn't one see evidence of the electron's "quantum leap"? What's going on?
Moderator, please size my photo. Thank you.
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