if we succed in stopping a photon than what happens?
Answers
Answer:
You can’t stop a photon. A photon is actually a wave that has its phase velocity, which is a given. If the wave has an especially big crest at some specific point (call it a tsunami), we speak of a particle.
Such a wave with a local peak is actually a superposition of many waves with different wavelengths, which happen to combine in such a way that the local peak is formed. In physics, the wavelength is associated with momentum of the wave/particle.
The problem is that, when there is a fairly well discernible peak so we can speak of a particle at some specific point, we cannot determine momentum - there is just such a cocktail of different wavelengths. Conversely, when the wave is fairly regular, with a defined wavelength and momentum, we cannot localize a point in space where there would be a specially strong crest.
Explanation: