how can i measure the mass of photon?also what is phonon?

Answer 1

I believe a Photon has no mass. It has an energy, given by:

E=hf, where h is Plank's constatt, and f is the light frequency. Then, by Einstein's equation, E=mc^2, you can calculate the equivalent mass as:

m=hf/c^2

As for Phonons, refer to wikipedia.

In physics, a phonon is a quantized mode of vibration occurring in a rigid crystal lattice, such as the atomic lattice of a solid. The study of phonons is an important part of solid state physics, because phonons play a major role in many of the physical properties of solids, including a material's thermal and electrical conductivities. In particular, the properties of long-wavelength phonons give rise to sound in solids -- hence the name phonon, i.e., voice in Greek. In insulating solids, phonons are also the primary mechanism by which heat conduction takes place.

Answer 2

Photon also called Light Quantum, minute energy packet of electromagnetic radiation. The concept originated (1905) in Einstein's explanation of the photoelectric effect, in which he proposed the existence of discrete energy packets during the transmission of light. Earlier (1900), the German physicist Max Planck had prepared the way for the concept by explaining that heat radiation is emitted and absorbed in distinct units, or quanta. The concept came into general use after the U.S. physicist Arthur H. Compton demonstrated (1923) the corpuscular nature of X-rays. The term photon (from Greek phōs, phōtos, “light”), however, was not used until 1926. The energy of a photon depends on radiation frequency; there are photons of all energies from high-energy gamma- and X-rays, through visible light, to low-energy infrared and radio waves. All photons travel at the speed of light. Considered among the subatomic particles, photons are bosons, having no electric charge or rest mass and one unit of spin; they are field particles that are thought to be the carriers of the electromagnetic field.

Answer 3

IMHO the guy is a schmuck. i ask your self what he thinks the mass of YHWH is. the party I gave became radio waves, yet magnetic fields are a good one too. i'm attempting to imagine in the adventure that they have got an capacity equivalent mass or not. Air does have mass, measuring airspeed relies upon upon a number of the kinetic capacity of the air being transferred to the kinetic capacity of the anemometer, so as it really is not this kind of high quality party. You strike a cord in me that i want to go decrease back and be conscious what the subsequent stupid declare he makes is.

Answer 4

mass of a photon is not avaluated till date.
there are no theories existing to stop a photon and hence we cannot measure the mass of a photon.
but we assume that the rest mass of a photon is zero

Answer 5

NO PROOF OF MASS OF PHOTON.
BUT ITS REST MASS IS ASSUMED TO BE ZERO.
THIS IS VERY IMPORTANT IN SOLVING PROBLEMS!!!