Lockheed Martin plans to make its most powerful military laser yet, 500 kilowatts::The planned laser will be in the 500-kilowatt range. Weapons like these can defend a ship or base against drones or other projectiles.

  • Whiskey Pickle@lemmy.ml
    link
    fedilink
    English
    arrow-up
    31
    ·
    edit-2
    1 year ago

    for those wondering, the (fictional) laser in the 1985 film Real Genius that could vaporize a human target from space was 9.4 megawatts.

    • calabast@lemm.ee
      link
      fedilink
      English
      arrow-up
      12
      arrow-down
      2
      ·
      1 year ago

      For anyone wondering, it would take 128.7 Real Genius laser beam blasts worth of energy to make one time travel jump in Back to the Future’s Delorean.

      • Whiskey Pickle@lemmy.ml
        link
        fedilink
        English
        arrow-up
        2
        ·
        1 year ago

        I thought someone might. I just happened to be watching it last night, so I remembered the power rating of the laser.

        • peopleproblems@lemmy.world
          link
          fedilink
          English
          arrow-up
          2
          ·
          edit-2
          1 year ago

          this is why I sort of ducked out when they started doing the math with lasers, cause my brain could only take so much physics fuckery

          sqolid state physics is something else as well

          • flossdaily@lemmy.world
            link
            fedilink
            English
            arrow-up
            8
            ·
            edit-2
            1 year ago

            An important thing to remember about any topic is that it’s actually more accessible than you’d think.

            Even quantum computing boils down to basic matrix math that you can learn in 5 minutes, the concept of superposition, and an understanding of logic gates. These are all intimidating concepts, but always, always, always complicated terminology is just simple concepts stacked onto each other.

            That stuff about the inverse square law… all it is is being aware that it’s an equation that measures how weak an omnidirectional signal gets the farther away from it you move. So, for example how much light a lightbulb would send into your eye based on how close you are to it.

            Lasers use phased lightwaves that don’t dim at a distance the way a lightbulb does because they are not omnidirectional. All their light is highly focused in one direction.

            So when he mentioned the inverse square law it sounded wrong to me, so I asked the question. I didn’t know. Maybe it’s a modified version of that equation?

            It never hurts to ask. And it turns out that he did misspeak. He corrected himself, and now I’ve learned just a tiny bit more than I knew before.

  • flossdaily@lemmy.world
    link
    fedilink
    English
    arrow-up
    16
    ·
    1 year ago

    I wonder if the engineers have a jar in the laboratory, where you have to put in a dollar every time you refer to the laser as a “death ray.”

  • 1984@lemmy.today
    link
    fedilink
    English
    arrow-up
    5
    arrow-down
    14
    ·
    1 year ago

    Yeah this is what we need… More weapons to kill eachother.

    • BombOmOm@lemmy.world
      link
      fedilink
      English
      arrow-up
      27
      arrow-down
      8
      ·
      edit-2
      1 year ago

      Lasers like this are mostly useful as defensive weapons. They are good at shooting incoming artillery shells, missiles, and small drones. They don’t have the range to be an effective offensive weapon. Kinetic effectors dominate there.

      If these existed today, many fewer Ukrainian civilians would be dead from Russian drones and missiles.