17 points
*

Mirrors melt and break when hit with a laser of more than “pretty lights power”.
This dude built a 2kW one with optics: https://www.youtube.com/watch?v=xNmbvaUzC8Q
mirror at ~ 4:30

EDIT: I know where I am, that video is too good not to share though. Vote away.

permalink
report
reply
7 points

I rarely give my time to videos that long, but it was awesome for the full half hour. That guy’s having fun. Thanks for sharing.

permalink
report
parent
reply
3 points

It’s very important that we give him views before he kills himself doing a YouTube stunt

permalink
report
parent
reply
6 points

Nah. This doesn’t count because that guy is clearly from the future when you can buy a 1K laser at the corner store. In 2024, they are a little bit harder to come by.

permalink
report
parent
reply
2 points

This is the most fascinating thing I’ve seen on youtube in a long time.

permalink
report
parent
reply
3 points

I actually studied laser physics in university and still learn a ton of practical shit from styropyro videos

permalink
report
parent
reply
27 points

If you fire a laser against a mirror, it bounces but raises the heat of the mirror so you end up melting the mirror and destroying the drone.

permalink
report
reply
22 points

🙄

permalink
report
parent
reply
9 points

But the drone stays in the air by making wind, which would cool down the mirror?

permalink
report
parent
reply
4 points
*

Unironically yes. If that’s not enough, add water.

permalink
report
parent
reply
3 points

A laser attack during a hurricane would really surprise the target.

permalink
report
parent
reply
10 points

Depending on how long you do it, how powerful the laser, and how quickly it can cool off at the same time.

And like the other guy said, you can make really good mirrors if you only care about one wavelength.

permalink
report
parent
reply
25 points

I may risk being too credible here, but a $80 drone is a lot more expendable than a $40m laser tank. The drone can be considered a consumable. Hell, mark the drones down as ammo.

permalink
report
parent
reply
5 points

not if you have total internal reflection

permalink
report
parent
reply
8 points

In all seriousness, wavelength-specific dielectric mirrors can approach six nines of reflectivity.

The hard part is hitting the mirror instead of the drone.

permalink
report
parent
reply
3 points

Just make the mirror as wide as the drone! Oh, wait…

permalink
report
parent
reply
3 points

And keeping the mirror surface clean

permalink
report
parent
reply
0 points

Not stupid just single track minded. Doing as told with no deviation. The stupid ones are the officers driving the r&d battalions

permalink
report
reply
13 points

Buddy called inverse-square law

permalink
report
reply
20 points

Inverse square law is just a geometric limitation, focus your lasers more, problem solved.

permalink
report
parent
reply
4 points

“You see, men, the lethal range is limited by this airy disk… stop giggling!

permalink
report
parent
reply
32 points

the tank is confused by its own reflection and attempts to fight itself

permalink
report
reply
5 points

This is why certain Army weapons are not appropriate for the Marines

permalink
report
parent
reply

NonCredibleDefense

!noncredibledefense@sh.itjust.works

Create post

A community for your defence shitposting needs

Rules

1. Be nice

Do not make personal attacks against each other, call for violence against anyone, or intentionally antagonize people in the comment sections.

2. Explain incorrect defense articles and takes

If you want to post a non-credible take, it must be from a “credible” source (news article, politician, or military leader) and must have a comment laying out exactly why it’s non-credible. Random twitter and YouTube comments belong in the Low Hanging Fruit thread.

3. Content must be relevant

Posts must be about military hardware or international security/defense. This is not the page to fawn over Youtube personalities, simp over political leaders, or discuss other areas of international policy.

4. No racism / hatespeech

No slurs. No advocating for the killing of people or insulting them based on physical, religious, or ideological traits.

5. No politics

We don’t care if you’re Republican, Democrat, Socialist, Stalinist, Baathist, or some other hot mess. Leave it at the door. This applies to comments as well.

6. No seriousposting

We don’t want your uncut war footage, fundraisers, credible news articles, or other such things. The world is already serious enough as it is.

7. No classified material

Classified information is off limits regardless of how “open source” and “easy to find” it is.

8. Source artwork

If you use somebody’s art in your post or as your post, the OP must provide a direct link to the art’s source in the comment section, or a good reason why this was not possible (such as the artist deleting their account). The source should be a place that the artist themselves uploaded the art. A booru is not a source. A watermark is not a source.

9. No low-effort posts

No egregiously low effort posts. These include Social media screenshots with a title punchline / no punchline, recent (after the start of the Ukraine War) reposts, simple reaction & template memes, and images with the punchline in the title. Put these in weekly Low effort thread instead.

10. Don't get us banned

No brigading or harassing other communities. Do not post memes with a “haha people that I hate died… haha” punchline or violating the sh.itjust.works rules (below). This includes content illegal in Canada.


Join our Matrix chatroom


Other communities you may be interested in


Banner made by u/Fertility18

Community stats

  • 5.1K

    Monthly active users

  • 1K

    Posts

  • 7.7K

    Comments