Why is photon travel at constant speed similar to the speed of light?

Through the vacuum of space, no matter what their energy is, they always travel at the speed of light. The highest-energy photon and the lowest-energy photon ever observed both travel at exactly the same speed.

Is light a wave or a particle prove your answer?

Light Is Also a Particle! Now that the dual nature of light as “both a particle and a wave” has been proved, its essential theory was further evolved from electromagnetics into quantum mechanics. Einstein believed light is a particle (photon) and the flow of photons is a wave.

Does a photon always have the same energy?

Yes. Since they have no rest mass, the rest energy for all photons is zero. The equation you are citing equates the rest mass (m) of an object, to the rest energy of that object (E).

Why is the speed of light always constant?

Unless it’s travelling through a vacuum, the speed of light isn’t always constant. It depends on the medium the light is travelling through. It isn’t. The speed of light is no ordinary speed, however: it’s a universal constant that emerges from the laws of physics.

Why light has a constant speed?

Ergo, light is made of electromagnetic waves and it travels at that speed, because that is exactly how quickly waves of electricity and magnetism travel through space.

How is a photon a wave and a particle?

When we’re thinking of light as being made of of particles, these particles are called “photons”. Photons have no mass, and each one carries a specific amount of energy. Meanwhile, when we think about light propagating as waves, these are waves of electromagnetic radiation.

Why is light a wave and a particle?

Quantum mechanics tells us that light can behave simultaneously as a particle or a wave. When UV light hits a metal surface, it causes an emission of electrons. Albert Einstein explained this “photoelectric” effect by proposing that light – thought to only be a wave – is also a stream of particles.

Does all light travel at the same speed?

Generally speaking, we say that light travels in waves, and all electromagnetic radiation travels at the same speed which is about 3.0 * 108 meters per second through a vacuum. We call this the “speed of light”; nothing can move faster than the speed of light.

Are all photons the same photon?

All photons (if they carry the same energy within them) are identical to all other photons of that energy. Protons are identical to other protons, and neutrons are identical to other neutrons.

What happened to the wavelength of photon after it collides with an electron?

When a photon collides with an electron then the effect of it is called Compton scattering where the photons interact with the electron, losing momentum and therefore increase in wavelength.

Why do photons always travel at the speed of light?

Some people say that the reason a photon travels at light speed the moment it is created is because it is a massless particle, and therefore must always travel at the speed of light. While it is true that the photon is massless and therefore always travels atcin all reference frames, this is not the reason that it is created already having a speed.

How fast can a photon travel in a vacuum?

A photon is a quanta of light. So there is no other possible speed a photon could travel at! Now if you mean the speed of light in a vacuum [math]c[/math], they don’t. If you were to told that the answer is either being taken out of context, or the person who told you that is VERY confused.

Why can’t objects with mass reach the speed of light?

So objects with mass cannot ever get to the speed of light. On the other hand, since photons have no mass, it takes no momentum to get them to the speed of light! If by the speed of light you mean the velocity light is moving, well that is easy.

Why is light considered a wave?

We can think of light as a wave, because it does all the stuff that waves do: reflect, refract, interfere. Einstein showed that light comes in discrete energy units he called “quanta”. Those are the photons. You can think of them as “wave packets”. And yes, in free space photons travel in straight lines.