All Questions
13
questions
-2
votes
1
answer
87
views
Why does there need to be a particle representation of light?
Why does there need to be a particle representation of light? Doesn't light as a wave explained the observations of the photoelectric perfectly? When the frequency of light is increased, the speed of ...
0
votes
0
answers
27
views
How does the current flow in the Hertz expermiment when reverse voltage is applied and the polarity of the electrodes is reversed?
In the Hertz experiment, when light falls on the anode, electrons are emitted and they move towards the cathode and thus flow through the circuit.
However, when reverse voltage is applied and the ...
- 1
0
votes
1
answer
91
views
Reducing the filament voltage has no effect on the maximum photon energy produced by characteristic or Bremsstrahlung radiation. TRUE - why?
I'm studying for my radiology exams and I don't understand the answer to this question.
It states that the following sentence is true:
Reducing the filament voltage has no effect on the maximum ...
1
vote
0
answers
71
views
Why do some electromagnetic waves have more than one photon?
I know that the energy of an EM wave is equal to nhv, where n is the number of photons, but why/how do the number of photons in a wave vary? If a single atom emits an EM wave with an energy of 100 ...
- 53
2
votes
1
answer
225
views
Instantaneous ejection of photoelectrons indicative of particle nature of light?
My physics textbook under a section explaining about How wave nature of light does not explain Photoelectric effect, mentions the following:
No matter how small is the intensity, photoelectrons are ...
- 133
2
votes
1
answer
248
views
Does amplitude modulation change a photon's frequency or the number of photons?
In the following, we assume that the polarization is aligned such that the scalar treatment of the electric field is justified.
Furthermore, we limit the discussion to a fixed coordinate $x=0$ to drop ...
- 543
0
votes
0
answers
23
views
How can I sample the solar spectrum to determine, in the vacuum of space, the frequency of a random photon?
I am working on improving a spacecraft charging model by simulating the photoelectric effect. To do so I need to determine the frequency of a random photon coming from the sun. How would I go about ...
- 1
1
vote
1
answer
254
views
What produces higher frequency light?
I don't know much more than the basics of the theory, so if my question stops making sense at some point, an answer addressing that would be awesome.
From what I understand so far, photon creation ...
- 3,075
-1
votes
2
answers
414
views
Why does the fact that the max. KE of photoelectron increases with increasing frequency of light contradict with the classical theory
It is stated that the experimental result from photoelectric effect that
The max. Kinetic Energy of the photoelectrons after the emission from
the surface depends upon the frequency of the ...
- 2,283
1
vote
0
answers
135
views
Frequencies emitted when electron falls back to lower energy state
Does an excited electron fall straight back to ground state like a quantum jump or does it go through the intermediate states which would result in different frequencies of photons being emitted lets ...
- 11
1
vote
0
answers
30
views
How to decide whether light shows particle of wave nature? [duplicate]
I have had this question for quite a time. I have recently studied about photoelectric effect. I was taught that light consisted of particles called photons that carried inherent energy with it, that ...
- 3,187
2
votes
0
answers
190
views
Why call it a particle and not a wave pulse?
My physics textbook says that photoelectric emission provides conclusive evidence for the particle theory of light. Apparently, since photoelectric emission only works at certain frequencies, we can ...
- 562
6
votes
1
answer
698
views
How is a CCD able to collect images in drastically different lighting conditions?
I have read the basics of how a digital camera works.
As much as I have understood, the digital cameras have a device called a CCD on which photons coming from the lens are incident. The CCD then ...
- 163