Table of Contents

## What are the dimensions of a photon?

The 1985–89 Hunter-Wadlinger electromagnetic theory of the photon predicted that the photon is a soliton-wave with the shape and size of a circular ellipsoid of length λ the wavelength), with a diameter of λ / π.

**What is the best way to describe a photon?**

A photon propagates at the speed of light. A photon describes the particle properties of an electromagnetic wave instead of the overall wave itself. In other words, we can picture an electromagnetic wave as being made up of individual particles called photons.

### How is a photon described?

A photon is a tiny particle that comprises waves of electromagnetic radiation. Photons have no charge, no resting mass, and travel at the speed of light. Photons are emitted by the action of charged particles, although they can be emitted by other methods including radioactive decay.

**Is a photon one dimensional?**

Individual photons travel in “empty” space for very long distances maintaining (except for red shift and other subtle effects) their wavelength, energy, momentum, and do not disperse or diffuse. The idea of a photon being some sort of classical three dimensional electromagnetic soliton is therefore a natural one.

## Do photons change size?

A photon is a massless “particle”, and an infinite number of massless particles can occupy the same space. Hence, size is meaningless for a photon and all massless particles.

**Do photons have width?**

Thus, the width of a photon is invariant in all coordinate frames and all photon frequencies. This extremely small size suggests that a photon has no energy, but interacts with the vacuum field to provide energy for excitations.

### Which of the following are characteristic of photon has?

Photons have no mass but they have energy. E=hv where h is the planks constant. The energy of each photon is inversely proportional to the wavelength of the associated EM wave. E=hv=hλc

**How is a photon like a particle?**

The identification of the photon as a particle seems to rest upon its delivery of energy and momentum to a point in space and time. nevertheless call a photon a particle because, just like massive particles, it obeys the laws of conservation of energy and momentum in collisions, with an electron say (Compton effect).”

## Are photons bigger than electrons?

Electron is bigger, it having mass whereas photon we can assume it as masseless particle which has energy packets in the form of quanta. A photon has no definite size, so it can be considered smaller than an electron.

**What would happen if light could exist in higher dimensions?**

Assuming light can exist in higher dimensions, it would behave very strangely. Sound waves too. In odd dimensions other than 1 (3, 5, 7, …) waves behave the way we normally see and hear things: a wave is formed, it moves out, and it keeps going.

### Does a photon have to have a significant length?

Further experimental proof that the photon must have a significant length is that the spread in its frequency is minimal. if it reduced to 0 amplitude over (e.g.) only 3 wavelengths then this would give it a significant spread in frequencies For me I prefer an experimental definition of the size of a photon.

**What is the energy density of a photon?**

If the photon is point-like then the energy density would be infinite which seems unrealistic. It must be localized in space as photons can be detected from the other end of the universe. If photons are spreading out then their energy density would tend to zero over these distances.

## Why is a photon called a fundamental particle?

The fundamental particles we know today (of which the photon is one) are called fundamental exactly because they have no substructure, or indeed, spatial extent, we know of. They are point-like when localized.