109 views

### Why not use this experiment to test gravity's quantum properties?

If a heavy object $X$ is in superposition, let's say, at two places "at the same time", to which point is the gravitational pull of that object directed to? This can probably not be answered without ...
106 views

### How does photoelectric effect prove that light is also a particle?

I was watching this experiment (https://www.youtube.com/watch?v=v-1zjdUTu0o) which demonstrates the photoelectric effect, but it does not make any sense to me how it proves light as a particle instead ...
55 views

### Quantization and wave-particle dualism of light

I'm studying atomic spectras and got puzzled about light-quantization. I'll expose my effort to understand it so far. Blackbody radiation Around the year $1900$ Planck explained blackbody radiation ...
379 views

### Is a purely classical description of lasers possible?

Laser action is usually described in terms of photons and stimulated emission. In 1972, Borenstein and Lamb published a paper* claiming that lasers can be described classically on the basis of ...
296 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 ...
251 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 ...
944 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?
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 ...
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 ...
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 ...
195 views

### How energy of a photon or EM wave has something to do with frequency?

While I was thinking what exactly meant by energy in quantum mechanics, I was quite shocked by the fact that it is proportional to frequency. $$E=hf$$ Given the fundamental definition of energy in ...
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 ...
388 views

### Why do electrons eject only if the frequency of incident ray is greater than the threshold frequency? [closed]

Why do the electrons start moving even if the dim light (less intense) of a specific frequency falls on the material ?