slepkov.bsky.social
Physics prof at the largest small university in Ontario, Canada. Ultrafast lasers, microscopy, microwave photonics, physics education, multiple-choice assessment. Funny is good. A pervert for nuance.
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Seeing the demo, I now assume it is independently-polarized RGB bulbs. Your green is orthogonal to magenta (blue+red).
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I assume(d) that the source is uniformly-polarized white light, and that the polarizing slide in your hand is a 2-layer stack. If so, the order of the layers matters immensely.
If, however, the slide in your hand is a simple polarizer, then the light comprises independently-polarized RGB bulbs.
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Tom, I presume that the filter is a stack of two optical elements, the first one (closest to the source) is a wave-plate of sorts or some birefringent film and the backing layer is a linear polarizer.
See: doi.org/10.1119/5.00...
One question: If you flip the slide over, do the colours disappear?
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This is water at microwave frequencies. With an index of refraction os 9 at 2.5GHz, you get a polarization angle (Brewster's angle) at very shallow angles. This must be relevant to cellphone signals near bodies of water.
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This is important, most of all because the reflected light at grazing angles will be somewhat polarized.
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Is this for 'unpolarized' light?
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This is 6.5 pages long, but lots of it is figures. I think you'll find it appropriate for the sophomore/junior level.
doi.org/10.1119/5.00...
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Oh, what fun!
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If flight is the obvious optimal endpoint of locomotion, all land animals would have evolved to fly, and certainly no birds would have lost flight via evolution.
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Heck, I would go vegetarian if I was assured a steady supply of dal makhani and any of various Tamil eggplant dishes.
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you got it!
It's been years since I've made it. It's going alongside tandoori chicken and dal makhani!
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@physgal.bsky.social
Can I please be added to the list?
scholar.google.com/citations?us...
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AN HOUR HERE AND THERE in one week?! TO THINK OF SCIENCE?!
This must be how the other half lives!
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Congratulations, Mikhail!
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@physgal.bsky.social
Hi Sarah, would you please add me to the list(s) as well?
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I couldn't agree more
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That's like $10 worth of pine nuts on one plate. Add caviar, why dontcha?!😝
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too soon
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How about a 3D grid of alternating square cubes of two different inexes? Say, acrylic and glass blocks arranged in alternating 16x16x16 blocks? Direct incidence well imaged, but anything else suffers mild blurring?
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Learning the course material is only marginally more time consuming (but vastly more productive) than mastering ChatGPT as a replacement for learning such content.
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We are about to return to the golden age of oral assessments.
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So, is ice physisorbed water?
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and what does it mean? I'm always confused by the precise transition from physisorption and chemisorption.
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OK, now that you are here to stay, you have to follow me. As per the BARpod rules, you have to follow back any Primo who mentions being a pervert for nuance in their bio.
It's your rule; not mine!
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Richard Muller's definition of a scientist:
A non-scientist is easily fooled and is particularly vulnerable to self-deception
A scientist is easily fooled and is particularly vulnerable to self-deception, and knows it.
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Sorry to hear this. Having had a rough family year myself, I'm hoping your troubles are transient.
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Monk it is, then!