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Cake day: April 24th, 2025

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  • MOCVD@mander.xyztoScience Memes@mander.xyzFeynman rules
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    14 days ago

    All models are wrong, some models are useful. A model that is 100% correct is just reality. Science and physics boils down to observation followed by explanation which comes in the form of modeling.

    New physics started when plank discovered quantization while integration raleigh-jean and weins laws for blackbody radiation. Schrodinger proposed a model among several proposed models and his fit the best.

    Anyone who is surprised by science not knowing all the answers had fundamentally misunderstood science.

    Finally, five fields: electromagnetic, gravity, strong, weak, and higgs. Magnetism is just an effect of leptons interacting with the electric field. That’s the model, one day when we can explain more with another model there will be more questions.

    Bonus points for anyone who knows the quote “who ordered that?”




  • MOCVD@mander.xyztoMicroblog Memes@lemmy.worldBands
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    2 months ago

    People, stop ruining music! Tell your kids you’ve never heard of AC/DC but they have got to hear this band called Nickelback. If they respond “you don’t know good music” then your job is done and they think AC/DC is amazing.






  • It’s more complicated. Silicon has an overwhelming advantage on manufacturing because of IC, ultimately that will make the dollar per watt hard to beat. That’s why Alta focused on applications with limited area.

    I mentioned halides earlier (also called perovskite unfortunately). If you look at the NREL chart https://www.nrel.gov/pv/cell-efficiency the bottom right showed halides rapidly increasing in efficiency and the manufacturing has the potential to scale a lot. I remember a conference presentation a few years back showing efforts to repurpose newspaper printing machinery and just roll out cells at high volume.

    My secret little inside tin foil hat voice says China might not be comfortable with an American supremacy in tech that can make relatively inexpensive drones that stay in the air indefinitely.





  • This right here is why you do not ever trust Media coverage of science. This shows a good increase for a particular material system, but to be clear: Silicon solar panels can achieve around 20-25 mA/cm^2 at 0.7 V while this system jumped up to 11.3 MICRO amps at 7 MILLI volts. A jump for a material system is published to show that a material could use further study, but that doesn’t mean it’s competitive with current tech yet. The real thing to watch for is increasing efficiency and low cost of halides.

    I’m a solar researcher, I’m used to any attention over hyping our results.