Table of Contents
How do we know that photons exist?
The photoelectric effect shows that the energy from light is delivered to a metal surfaces in packets of size hf. The Compton scattering of electrons and light acts like the light comes in packets of energy hf and momentum hf/c, just like photons should do.
Does light really exist?
It comes directly from the fact that light does not actually exist. That is why light has become the measure of all measures in the cutting edge of fundamental physics: It does not itself exist!
Are photons really particles?
The photon (Greek: φῶς, phōs, light) is a type of elementary particle. It is the quantum of the electromagnetic field including electromagnetic radiation such as light and radio waves, and the force carrier for the electromagnetic force.
Does only light have photons?
Photons are massless, so they always move at the speed of light in vacuum, 299792458 m/s (or about 186,282 mi/s). The photon belongs to the class of bosons….Photon.
| Photons are emitted in threaded laser beams | |
|---|---|
| Composition | Elementary particle |
| Statistics | Bosonic |
| Family | Gauge boson |
| Interactions | Electromagnetic, Weak (and Gravity) |
How do we know that photons really exist?
The photoelectric effect shows that the energy from light is delivered to a metal surfaces in packets of size hf. (We now do this as a lab for undergraduates.)
What is the difference between photons and electrons?
Photon is a bulk of energy while atom is made up of proton, neutron and electron. Photons can have energy according to its frequency, atom can have different number of proton, neutron and electrons. Photons always travel at the speed of light while atoms can vibrate within their equillibrium position.
Do photons attract each other?
keeps protons attracted to each other if they are little far away. keep proton repelling each other if they become two close. Hence they act as balancing force of nature. They bind quarks and proton both together receptively.
Do photons have any mass at all?
Photons are tiny packets, or quanta, of light, and have energy in the form of electromagnetism. They do not have mass, but they do have momentum – a property in physics which is usually attributed to an object’s mass. However, the momentum of a photon is not dependent on mass but on its frequency.