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Joined 1 year ago
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Cake day: August 10th, 2023

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  • I think no one around here realizes how fucking insane a 5 W laser pointer is, it’s not blinding people level, it’s more like, don’t shine it at anything white or you might blind yourself level.

    For reference the highest laser security classification starts at 0.5 W.

    Maybe I’m exaggerating here but 5 W is definitely a lot.

    So yeah, I’m down with the laser pointer.



    1. Light = energy, shorter wavelengths= higher energy. Blue light has a shorter wavelength than red light. UV has even more energy. X-Rays have a lot more energy. For reference in the visible spectrum were talking about maybe 1-4 eV (this may be wrong, I’m too drunk to look it up rn).

    2. If we want to produce light, the aim is to find an energy gap that has the exact energy gap that corresponds to the wavelength we’re interested in. Typically this corresponds to an electronic transition, i.e. an electron “jumps” into a higher orbital, on its way down it will emit the energy difference as light.

    2.1 X-Rays rn are produced by accelerating electrons onto a metal plate with high voltage. The impact of the electron “rips” out an electron in the close vicinity of the nucleus. Another electron will take the place of that electron, the energy gap associated with that process is large, which is why it produces X-Rays.

    1. If we want to produce LEDs that emit in the far UV range we have to find large energy gaps in materials which is difficult. We still have to have a way to get the electron across the energy gap using electricity.

    2. X-Ray LEDs are probably not realistic, as the energy of x-rays is so large that we have to rip out electrons from the close vicinity of the nucleus… which is already what we’re doing with X-ray tubes.


  • Mo5560@feddit.detolinuxmemes@lemmy.worldHere we go
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    9 months ago

    I can’t speak for everyone but I used to say “I can’t drop windows because I need XYZ programs all the time”.

    Well turns out I don’t, and turns out it’s surprisingly easy to tell my employer (well my professor really, I am a PhD student) “Sorry I can’t run that program, I don’t have windows”. If they don’t accept it, they can supply me with a windows PC.




  • Why do y’all have to write in such a condescending/rude way?

    My point was Bluetooth is not better in every way and I stand by that (you seem to too).

    Personally, I have 2 pairs of headphones 1 pair of in-ears and 1 pair of over-ears, I use my over-ears for everything except band practice and gigs (where I use in-ears). Buying more headphones just so I can use them with my phone seems ridiculous to me.

    I am happy that you find joy in wireless headphones, and I’ll stop talking now in fear of summoning that Candybar Jerk again.




  • I don’t intend on turning this into some sort of fight but to me your comment has big

    “I don’t see the problem why can’t other people just have enough money”

    vibes (Also I checked and an adapter costs me 12$ on Amazon). I don’t think you intended it this way, so I’ll shut up now.

    As to my actual answer:

    • Leaving it on headphones is not an option to me (I explained it above)
    • Buying one for every jacket might work, but what do I do in summer?
    • Please correct me on this but afaik it’s not standardized
      • USB output is usually digital, while headphone obviously require an analog signal. I assume the vendors just use certain pins in the USB jack for transmitting the analog signal while keeping the rest grounded.
      • I know for certain that Samsung adapters don’t work on OnePlus phones for example.

    I could go on, but there’s honestly no point. We’re different people with different uses for our phones/headphones. I won’t buy a phone without a headphone jack as long as I still have wired headphones.


  • I have 2 main problems with that:

    • My headphone cable is long and sometimes it gets tangled in all sorts of places. The adapters are small and flimsy, if I leave them on the cable I assume they’ll break soon. I have no problems with a broken headphone cable as it is an easy and cheap fix. I don’t think the adapters are seriously fixable tho.
    • Everything else uses a headphone jack everywhere. I have yet to see a use for USB-C to audio jack anywhere else. Which makes sense as USB is digital and audio is analog. I assume many people have no use for headphones outside of their phones, I am not one of those people.