Linked Questions

13
votes
4answers
2k views

How to rebut denials of the existence of photons? [duplicate]

Recently I have encountered several engineers who do not “believe in” photons. They believe experiments such as the photoelectric effect can be explained with classical EM fields + quantized energy ...
0
votes
1answer
297 views

Photoelectric effect and photons: what suggests a particle nature if we only measure resulting current? [duplicate]

I'm fairly noobish over here, but delving into the details of the major experiments. The particle nature of a photon has me stumped though. So hopefully there is already an explanation to this I have ...
434
votes
17answers
43k views

How does gravity escape a black hole?

My understanding is that light can not escape from within a black hole (within the event horizon). I've also heard that information cannot propagate faster than the speed of light. It would seem to ...
39
votes
6answers
11k views

Does a photon interfere only with itself?

I sometimes hear statements like: Quantum-mechanically, an interference pattern occurs due to quantum interference of the wavefunction of a photon. The wavefunction of a single photon only ...
21
votes
4answers
7k views

Are the Maxwell equations a correct description of the wave character of photons?

In basic quantum mechanics courses, one describes the evolution of quantum mechanics chronologically. Interference experiments with particles showed that particles should have a wave character; on the ...
8
votes
5answers
39k views

What is the relation between photoelectric current and frequency of incident light?

I googled it a bit and found that photoelectric current is independent of frequency(of incident light). Some further look revealed that actually "saturation current" is independent of ...
3
votes
2answers
13k views

Photoelectric effect as proof of the particle-like nature of photons

Why is the photoelectric effect cited as an example of a particle-like nature of photons? The photon's not physically knocking off the electron, right? It's supplying energy to break the bond, hence ...
12
votes
2answers
5k views

Do photons have relativistic mass?

I am conducting research on photons and was wondering if they have relativistic mass. I already know that they they have zero rest mass. Any answers are welcome!
12
votes
4answers
1k views

Can people create single photon in the laboratory?

Can a single photon be created in the laboratory? How do people make sure that they have really created a single photon?
10
votes
3answers
687 views

Can entanglement be explained as a consequence of conservation laws?

This article at NewScientist magazine (subscription required) describes entangling photons by passing them through a half silvered mirror. http://www.newscientist.com/article/mg21929282.100-quantum-...
12
votes
3answers
2k views

DIY Quantum Eraser Experiment by the Scientific American: Is this really quantum?

Click here for the publication. Having performed this experiment, I have gotten clean results. Essentially, a double slit is made by putting an photon beam in the way of a wire with orthogonal ...
2
votes
3answers
8k views

Why wave theory cannot explain photoelectric effect and provides evidence for particle nature of light?

I am able to understand how light can be modeled to have wave characteristics from Young's double slit experiment. But I am unable to comprehend how we can understand light to have particle ...
5
votes
1answer
824 views

Classical (or semi-classical) interpretation of photoelectric effect?

This site says that "it has recently been proven that the photoelectric effect can be interpreted classically (or at least semi-classically) in non-particle, wavelike terms". Is anyone familiar with ...
0
votes
1answer
2k views

classical physics and photoelectric effect

Why did classical physics failed to explain the fact that in photoelectric effect, there is a threshold frequency value below which the effect does not occur? I not sure if my answer actually ...
5
votes
3answers
311 views

Which particle aspect is required to explain photoelectric or Compton effect?

What do we mean when we say that it requires the particle nature of radiation i.e., photons, to explain photoelectric or Compton effect? I don't understand which particle nature is used to explain ...

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