Archive for the ‘Optics and Light’ Category:

2025-06-09 Solar Power Breakthrough Just Reached The ‘Impossible’ 75% Efficiency Mark

Combines traditional solar cells with an advanced layer of  phosphor-converted light concentrators.  It might be into production in 5 years. https://www.facebook.com/story.php?story_fbid=pfbid02qpdTvpwy88E1UjnesyFTVLsTQBepioD3ChGLdqAeC4fdb93uyWH195WcnZ4vXaK4l&id=61560066990109&post_id=61560066990109_pfbid02qpdTvpwy88E1UjnesyFTVLsTQBepioD3ChGLdqAeC4fdb93uyWH195WcnZ4vXaK4l&mibextid=Nif5oz

2025-06-01 Dark Roof Lobby Making Your City Hotter

This is a Floodlight article about Dark Roof companies and lobbyists trying to eliminate the laws cities are passing to make roofs white.  https://floodlightnews.org/this-little-known-dark-roof-lobby-may-be-making-your-city-hotter/?ref=im-a-reader-newsletter

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2025-05-01 Dr. Tyson Tells About The Predecessors Of The Hubble Telescope

The Hubble Space Telescope was preceded by the spies in orbit that looked down at the Earth to spy on other countries.  But Hubble instead looks up into space to see the farthest galaxies. https://youtube.com/shorts/t4GgPxBbPhg?si=5zDLcIolmCh6WLBn

2025-03-04 Dr. Seheult: How Long Wavelength Light From Leaves Enhances Mitochondrial Function

Everyone should listen to this.  It’s important. “”Leaves reflect long-wavelength light, thereby amplifying its positive effects on mitochondrial function. This is a nontrivial positive effect.””

2025-01-01 QR Codes Explained, Plus Bar Codes

Derek Veritasium shows us how QR codes work.  He pronounces the a in Veritasium like the a in tassel. https://www.facebook.com/reel/2506467346230147?mibextid=9drbnH&s=yWDuG2&fs=e

2024-10-12 First Ever Images Of Electric Charges Across Semiconductor Materials

Researchers capture first ever images of electric charges across summit conductor materials within a solar cell.  Times in picoseconds. https://pv-magazine-usa.com/2024/10/11/researchers-capture-first-ever-images-of-electric-charges-across-semiconductor-materials-within-a-solar-cell/t

2024-09-20 Simple 1 Digit Counter, IR Beam Break

This short uses a CD4026, a 7 segment display, 9V battery, some resistors, an IR LED and a CdS photocell or phototransistor.  Break the IR beam and the display advances to the next digit. https://www.facebook.com/reel/525596709839365?mibextid=9drbnH

2024-08-24 Two Ways To Travel Faster Than The Speed Of Light

Dr. Michio Kaku tells us there are two ways to travel faster than the speed of light. The first is to use a wormhole. The second way is, well, you’ve got to watch this short video to find out.  Let me remind you these are theoretical. https://youtube.com/shorts/Swa3tRP1p8Q?si=cXDnIpsb0D64igL2

2024-06-09 SMD LEDs Identification

Nice to know how to ID the polarity of SMD LEDs. https://lighthouseleds.com/blog/polarity-guide-of-0402-0603-0805-1206-and-most-all-smd-leds.html

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2024-05-11 New Capacitor With 19 Times Power Density Could Help EV Batteries Last Longer

It looks like this supercapacitor could quickly charge and discharge, thus reducing the cycles on the EV battery. https://www.livescience.com/technology/electronics/ev-batteries-could-last-much-longer-thanks-to-new-capacitor-with-19-times-power-density-that-scientists-created-by-mistake

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