Linked Questions

You are standing still in a vacuum, and you throw a ball that moves 10 m/s away from you. Now you start moving in one direction at 5 m/s, and throw the ball in the other direction, away from the ...

I have read many questions which ask whether there can be photons at speed other than the speed of light and all of them are answered no! But when the photon is created for ex during electron ...

Of course the speed of light is constant relative to everything. Its frequency can change, but its speed is constant. Photons may be absorbed by atoms or release by atoms as energy, but as soon as it ...

i understand that the photon when emitted is already travelling in the speed of light but how can it go from 0 to speed of light instantaneously. is it because photon is a mass less particle and the ...

Till now I have learned that light has fastest speed. But I have also noticed that wherever it travels it only experiences retardation. So I wanted to know if light ever felt acceleration naturally in ...

One source of light is, IIRC my high school physics, when an excited electron jumps back to its normal position. This jump generates a photon. How can an event like that shoot of a particle at the ...

Light is emitting from a source. Velocity of photon is always constant 'C' w.r.t stationary system. Say the source is moving at velocity 'V'. Then what is the velocity of photon at the instant of time ...

If, in vacuum, light is emitted from a source, would it accelerate really really fast until it reaches the well accepted speed of light $c$? If so, how small an interval does it take for it to do so?

What I mean is, suppose a ball is fired from a cannon. Suppose the ball is moving at 100 m/s in the first second. Would the ball have started from 1m/s to 2m/s and gradually arrived at 100m/s? And is ...

Photons travel at the fastest speed in our universe, the speed of light. Do photons have acceleration?

When some photon detector detects a photon, is it an instantaneous process (because a photon can be thought of as a point particle), or does the detection require a finite amount of time depending on ...

When an electron jumps from a high to a lower energy level and a photon is created, can the photon be detected from all vantage points or only from a discrete position? Does the atom nucleus cast a ...

I am curious as to how Photons began moving to begin with. Were they moving when they were first created or did some force have to act on it to start its movement?

Context & Question In physics, the fastest possible speed is accepted as the speed of light. No other mass has been recorded to travel as fast as the photon. What is the acceleration of the ...

Electricity flows from a point of higher level of potential toward a point of lower potential. Liquids flow from a point of higher level toward a point of lower level. I want to know, in the same ...