Naked Science Forum

Non Life Sciences => Physics, Astronomy & Cosmology => Topic started by: CZARCAR on 09/12/2011 16:47:18

Title: ?photon & phonon?
Post by: CZARCAR on 09/12/2011 16:47:18

photon shoots thru diamond & phonom vibration is created thus reducing the frequency of the photon upon exiting the diamond? What happens to the residual phonom?

Title: ?photon & phonon?
Post by: damocles on 09/12/2011 20:21:12

The phonon is a pseudo-particle that is invoked to describe the motion of a parcel of vibrational energy that remains coherent as it moves through a perfectly crystalline region of material. Its eventual fate is a typical 2nd Law fate: the coherence is gradually or suddenly lost as the phonon encounters defects and dislocations or crystal surfaces, and its energy degrades as its coherent motions become random thermal motions.

Title: ?photon & phonon?
Post by: yor_on on 12/12/2011 09:56:56

 

A photon is a quanta of energy, and a phonon is described as a quanta of vibrational energy. Which is real and which is fake? Maybe both? This universe seems to offer two interpretations, waves and quanta. Which one is more real I don't know. I'm expecting both to exist myself. And that it will be your experiment, added with the way you formulate/set up your question that will define what you measure.

"Often referred to as a quasiparticle, it represents an excited state in the quantum mechanical quantization of the modes of vibrations of elastic structures of interacting particles. Phonon. (http://en.wikipedia.org/wiki/Phonon)

"Heat can be conducted across a nanometre-sized vacuum gap – something that was deemed impossible until now. So say researchers at the Air Force Research Laboratory in Ohio who have found that the heat is transferred via an effect called "phonon tunnelling" in which quantized molecular vibrations, called phonons, appear to traverse the forbidden zone." Phonons tunnel across the vacuum (http://physicsworld.com/cws/article/news/44027)

Still, heat is also a form of radiation?

Title: ?photon & phonon?
Post by: Bill S on 12/12/2011 20:24:57

Quote

This universe seems to offer two interpretations, waves and quanta

Could one not consider a quantum (particle) simply as a wave that has been compressed to its limit?

Title: ?photon & phonon?
Post by: Soul Surfer on 12/12/2011 23:15:07

No Bill, the wave describes the particle but when you are standing far enough away you cannot see the waves just the general outline of the wave packet which IS the particle