2,347 reputation
1124
bio website nl.linkedin.com/in/…
location Canada
age 32
visits member for 3 years, 5 months
seen 23 hours ago

Apr
19
asked Third-order susceptibilities of metals?
Apr
12
answered How long do reflections take?
Apr
12
awarded  Citizen Patrol
Apr
11
comment 3d holograms - How are they created?
From 'Things often confused with holograms' on the Wikipedia page linked above: 'In 2010, there was a series of concerts ... which included Hatsune Miku ... performing on stage as a "holographic" character. This effect was actually achieved through a special method of rear projection against a semi-transparent screen.'
Apr
11
comment How can I determine transmission/reflection coefficients for light?
Note that the amplitude coefficients will give you the phase shift in reflection or transmission, and the intensity coefficients won't. So you can go easily from amplitude to intensity, but you can only go from intensity to the modulus of the amplitude.
Apr
10
comment Good algorithm for in-experiment 1-D optimization?
@HelderVelez, I have no desire nor time to create a self-learning system. Just want to hit the top of the curve approximately, preferably within a reasonable number of samples since each measurement takes time.
Apr
10
comment Good algorithm for in-experiment 1-D optimization?
I added a description of the algorithm I have now. I'm still interested in discussions of the best method, perhaps in an engineering journal?
Apr
10
revised Good algorithm for in-experiment 1-D optimization?
added description of slipshod algorithm
Apr
5
comment How much is 1 electron-volt (eV)?
A subatomic particle is much, much lighter than a mosquito. In a back-of-the-envelope calculation, let's say a mosquito is 1.7 grams and a proton is 1.7 $\times 10^{-27}$ kg. So to have the same kinetic energy as a flying mosquito, the proton must be travelling about $10^{12}$ times faster than the mosquito. That's a big deal.
Apr
5
asked Good algorithm for in-experiment 1-D optimization?
Mar
28
answered How does a flat wedge lens work?
Mar
15
comment Can a light beam be used as a wire for telephony?
Two students designed a system like this in a lab course I taught. It only worked one way over a distance of two meters and used cheap components, but it worked by modulating the voltage to a laser diode.
Mar
4
comment Quantum Cryptography
Do you mean "polarization" instead of "spin" by any chance?
Feb
9
comment Matlab package: graphical calculus for quantum operations including beam splitters and polarizing beam splitters
I'd be interested in helping to develop open source Python software for that...
Feb
7
comment How can a human eye focus on a screen directly in front of it?
Good question! See also en.wikipedia.org/wiki/Bokode for the opposite effect.
Jan
31
comment What makes some laser beams visible and other laser beams invisible?
Perhaps unnecessary to say, but when you are holding the pointer near your head, i.e. at eye level, make sure the beam isn't pointing towards other people either!
Nov
9
awarded  Nice Answer
Nov
2
awarded  Yearling
Oct
12
awarded  Analytical
Sep
19
comment Why are color values stored as Red, Green, Blue?
@Georg, spectrum reflected by an object is a physical property. What "color name" we perceive that spectrum as, is not. See blog.xkcd.com/2010/05/03/color-survey-results for an interesting informal survey.