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.

What is the wave speed of a photon?

speed of light
Photons travel at the speed of light, 2.997×108 m/s in empty space. The speed of a photon through space can be directly derived from the speed of an electric field through free space.

Do photons behave like waves?

In double slit experiment, photon behaves like a wave but in photoelectric effect, it behaves like a particle. It can be treated as both.

Are photons all the same?

A photon is an energy packet. Energy depends on frequency. So, no, all photons are not the same.

Why do photons travel in waves?

Photon is not a normal particle it is a packet of energy, so Photon travels in a wave because wave carries energy and since Photon itself is a packet of energy so therefore Photon travels in a wave.

How long is a photon?

So excluding space everything has mass & hence also has size and hence photon also has size. , 400 n m–700 n m=(4–7) X 10^-9 meter,which means photon can be in any wave length depending on its energy,which a gain means no specific size to photon. You can’t think of photons as a tiny spherical particle.

How is photon like a particle?

Red photons, for example, have less energy than blue ones. He theorized that electromagnetic energy comes in packets, or quanta which we now call photons. So light behaves as a wave and as a particle, depending on the circumstances and the effect being observed. This concept is now known as wave-particle duality.

What is the relationship between photon energy and photon wavelength?

Photon wavelength has an inverse relationship to photon energy. For example: In energy wave theory, a transverse wave is created from a particle that is vibrating perpendicular to the direction of wave motion. A faster vibrating particle results in a transverse wave with a shorter wavelength than a particle that vibrates slower.

What are the effects of wave frequency on photoemission?

The effects of wave frequency on photoemission. The frequency of red light (left) is less than the threshold frequency of this metal , so no electrons are ejected. The green (middle) and blue light (right) have , so both cause photoemission.

What happens when a photon hits a metal surface?

When a photon hits the metal surface, the photon’s energy is absorbed by an electron in the metal. The graphic below illustrates the relationship between light frequency and the kinetic energy of ejected electrons. The effects of wave frequency on photoemission.

What is the photoelectric effect in physics?

Predictions based on light as a wave. To explain the photoelectric effect, 19th-century physicists theorized that the oscillating electric field of the incoming light wave was heating the electrons and causing them to vibrate, eventually freeing them from the metal surface.