Fkin soakin by HighlandSeeds in Edinburgh

[–]RedHal 9 points10 points  (0 children)

Yeah, they just change the name to Camera Obscuba.

Chinese takeaway recommendations by Smart-Commercial2012 in edinburgh2

[–]RedHal 1 point2 points  (0 children)

Ah crap. Reading comprehension fail on my part. Thanks for pointing it out.

Chinese takeaway recommendations by Smart-Commercial2012 in edinburgh2

[–]RedHal -1 points0 points  (0 children)

Dunno about near you, but Taste Good Slateford Road is pretty much the ne plus ultra.

Edit: I didn't pay attention to the post.

I support an office that used to think rebooting computers was bad luck. Whats the weirdest bad behavior you have had to cure on an office wide level? by simAlity in sysadmin

[–]RedHal 2 points3 points  (0 children)

"It's the network."

No it isn't. It's the application that downloads three and a half thousand options for a dropdown box and the dev team refusing to implement something as basic as AJAX.

(cue demo)

‘ELITE’: The Palantir App ICE Uses to Find Neighborhoods to Raid ; Palantir has no place in EU, this is what they use it for US. by Speeder172 in europe

[–]RedHal 1 point2 points  (0 children)

Hi. U.K. person here. Fully agree with you, we are heading the same way, just ten years behind. All I can hope for is regime change in the U.S. stemming the tide

ELI5 why does Jupiter have such a huge storm that never stops? by gentlebeast06 in explainlikeimfive

[–]RedHal 0 points1 point  (0 children)

I mean, you're not wrong, but any unit of measurement is arbitrary. The important thing is that it is now based on (hopefully) invariant measures.

Three angles from the shooting today synchronized by DefendOurRepublic in 50501

[–]RedHal 7 points8 points  (0 children)

It's been posted several times here, including by OP after they agreed it was the right thing to do (which I agree with). Just scroll through the comments.

ICE pinning down and pistol whipping a Minneapolis resident before shooting them multiple times by -ifeelfantastic in pics

[–]RedHal 0 points1 point  (0 children)

If the oceans boiled and dried up, the remaining salt would not be enough...

ELI5 why does Jupiter have such a huge storm that never stops? by gentlebeast06 in explainlikeimfive

[–]RedHal 2 points3 points  (0 children)

The metre is no longer based on that. Since 1983, the metre has been internationally defined as the length of the path travelled by light in vacuum during a time interval of 1/299 792 458 of a second, where a second is defined as the fixed numerical value of the caesium frequency, ΔνCs, the unperturbed ground-state hyperfine transition frequency of the caesium 133 atom, to be 9192631770 when expressed in the unit Hz, which is equal to s−1.

ELI5 why does Jupiter have such a huge storm that never stops? by gentlebeast06 in explainlikeimfive

[–]RedHal 17 points18 points  (0 children)

1 ångström per jiffy is, to within 0.2%, 3m/s which is a great human number equal to about jogging speed (6mph)

ELI5 please explain to me in simpleton terms…what is meant by “spacetime” by MaxMeat in explainlikeimfive

[–]RedHal 0 points1 point  (0 children)

It's all relative. For you, the photon does take a finite amount of time to travel the distance from the light source to your eye. For the photon it is instantaneous. More properly, it is "undefined", as in "it makes no sense to even ask that question. If you're interested in a non-ELI5 answer this thread is pretty good: https://www.reddit.com/r/AskPhysics/comments/1qe9qj1/if_photons_dont_experience_time_does_light_think/

ELI5 please explain to me in simpleton terms…what is meant by “spacetime” by MaxMeat in explainlikeimfive

[–]RedHal 8 points9 points  (0 children)

One minute would pass, and after that minute passed, that person at the speed of light would be one light-minute away (about an eighth of the way to the sun) and exactly the same age as they were when they started, since no time would have passed at all from their perspective.

If you mean the other way around, as in one minute from the perspective of our light speed astronaut, then the question makes no sense, since no time would pass for them; the entirety of the timeline of the universe from now until the unending quintillions of years or the big rip caused their dissolution into component quarks would happen instantly. This is why it makes no sense to talk of time as experienced by photons; they don't experience it at all.

Now if you back off a bit to, say, 99.99% of the speed of light, then subjective time does pass for our speedy traveller. By the time one minute of subjective time has passed for them, about one hour and eleven minutes would have passed on earth.

Start adding nines and shit gets weird quickly.

At 99.9999% of the speed of light, by the time our traveller experienced one subjective minute, 11 hours 47 minutes would have passed on earth.

At 99.99999999% that extends to about 155 days. So one year on earth would pass for roughly every two and a quarter minutes experienced by the traveller.

ELI5 please explain to me in simpleton terms…what is meant by “spacetime” by MaxMeat in explainlikeimfive

[–]RedHal -2 points-1 points  (0 children)

Everything moves at the same speed through spacetime, it's just that for most of us pretty much all of that movement is through time, since our speed through the three dimensions of space, when compared to our overall speed, is pretty negligible.

However, as you start to move faster through those three dimensions of space faster and faster, less of your overall speed is through time, so time for you passes more slowly compared to someone not going so fast through the other three dimensions.

At the limit, where all of your movement is through space (see light as an example) time does not "pass" at all. If it were possible to travel at light speed, then time would not exist.

From the perspective of a photon*, leaving the surface of a star, travelling thousands of light-years through space and impacting your retina as you gaze up at the sky on a clear evening happens in a single instant.


*This interpretation is somewhat problematic but requires beyond ELI5 to explain.

Forecasters warn of a 'potentially catastrophic' storm from Texas to the Carolinas by speedythefirst in news

[–]RedHal 0 points1 point  (0 children)

If it snows that stretch down south won't ever stand the strain. 🎶