2,523 reputation
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bio website nl.linkedin.com/in/…
location Canada
age 32
visits member for 3 years, 11 months
seen 10 hours ago

Jan
4
comment Why doesn't my pinhole camera work?
+1 for doing your own experiment though!
Dec
6
awarded  Enlightened
Dec
6
awarded  Nice Answer
Dec
4
answered Angle of rays leaving a light source
Dec
4
awarded  Constituent
Nov
27
awarded  Caucus
Nov
20
awarded  optics
Nov
19
revised Photon energy - momentum in matter
expanded answer to include Abraham-Minkowski controversy and microscopic picture
Nov
19
comment Photon energy - momentum in matter
actually, three: 1) $p=\hbar k$ is only valid for a photon in a plane wave mode, which people usually gloss over; 2) saying that phase matching is due to conservation of momentum is not accurate, despite it being popular to say in nonlinear optics; 3) of course you are right that the photon is traveling mostly in vacuum and so has $p=h\nu/c$; but that expression is useless at the scale of macroscopic dielectric media.
Nov
19
comment Photon energy - momentum in matter
I've thought and discussed about it some more and come to two insights:
Nov
19
comment Photon energy - momentum in matter
Indeed, the Abraham-Minkowski controversy is divided between whether the momentum of a single photon is larger or smaller in a dielectric, but it certainly doesn't stay the same!
Nov
19
comment Photon energy - momentum in matter
@MarkMitchison I'm aware that photons appearing to travel slower in water is purely due to averaging. However, the momentum of a single photon is h-bar times the wave vector, and the wave vector's magnitude is larger in a denser medium with a slower speed of light. This is how phase matching works in nonlinear optics - conservation of momentum. Also, surface plasmon resonance excitation mechanisms (such as the Kretschmann configuration) are explained by different photon momenta in different materials.
Nov
18
answered Photon energy - momentum in matter
Nov
2
awarded  Yearling
Nov
2
comment Are circular polarizations a basis for any light polarization?
In or out of the plane of reflection when reflecting off a surface: en.wikipedia.org/wiki/…
Nov
2
comment Are circular polarizations a basis for any light polarization?
I think if you see people using TM and TE to mean s and p polarization, it's probably wrong (although I admit to having done this myself in the past.)
Nov
2
comment Are circular polarizations a basis for any light polarization?
As far as I know, TM and TE are defined in terms of waveguides. For more info, see Wikipedia: en.wikipedia.org/wiki/Waveguide_%28electromagnetism%29
Nov
2
comment Are circular polarizations a basis for any light polarization?
TM and TE: not quite. If light is incident on a surface, then no transverse polarization is ever perpendicular to that surface.
Oct
25
comment Ideal four-level Gain Medium (or just any old gain medium)
I think you could improve your question by saying which parts you do and don't understand.
Oct
20
revised Is the number of rays projected by a source of light finite?
improved grammar