Clever, I like it. I wonder how many people read it and have no clue what it means.
72
RiceMunk @sopuli.xyz - 1day
Exercise for the reader: Assuming average human eyesight, how many picoseconds away from a collision are you if you can read that size of text and the relative velocity between you and the car ahead of you is large enough that the red label is sufficiently blueshifted to look blue?
58
Zkuld @lemmy.world - 1day
for 800nm to 400nm, we need gamma=2. So v~.86c. At 20m this gives you ~80ns.
55
moriquende @lemmy.world - 23hr
For perspective, this speed is:
928 157 450 kilometers per hour
576 730 301 miles per hour
In one second, you would travel around:
258 000 kilometers
160 000 miles
Which is around 6.43 times around the Earth's equator.
33
jaybone @lemmy.zip - 22hr
But how many Olympic sized swimming pools full of jello?
10
groet @feddit.org - 22hr
About 3 large boulders the size of a small boulder.
14
jaybone @lemmy.zip - 20hr
Did you see the boulder post too?
We are all the size of boulders on this blessed day.
4
moriquende @lemmy.world - 22hr
Depends on the flavor
2
fartographer @lemmy.world - 16hr
So, some paint might get exchanged?
4
not_woody_shaw @lemmy.world - 11hr
It was a graveyard graph.
1
glorkon @lemmy.world - 1day
The sticker should also say something like "But don't worry, we're going to be evaporated in a huge explosion anyway, due to the gigantic release of energy when you crash into my car in a few nanoseconds."
16
redsand @lemmy.dbzer0.com - 17hr
I want to know how fast you need to go to be color shifted on a traffic camera. The more I think about it the less likely getting enough light to be picked up by the camera might be an issue even with perfect placement
2
rizzothesmall @sh.itjust.works - 1day
So 75000km/s is too fast? Boooo, get off the road grandad!
44
Vex_Detrause @lemmy.ca - 7hr
So is the reader fast or would it work the other way where the car with sticker is fast?
1
glorkon @lemmy.world - 1day
Even then, a BMW would tailgate and flash its headlights at you on a German autobahn.
35
curled @lemmy.dbzer0.com - 21hr
Anyone would do that on an autobahn, get out of the passing lane slowpoke xD
14
far_university1990 @reddthat.com - 17hr
Best thing is when small car from 1990 push away large bmw or porsche because they have 900 hp engine with dual turbo and nitrous injection.
I love sleeper car.
2
ilinamorato @lemmy.world - 18hr
If the sticker is blue, one or the other of you is about to cease being biology and start being physics.
30
Mr_Dr_Oink @lemmy.world - 1day
I am not sure i understand. Is it something to do with redshift?
18
stray @pawb.social - 1day
Yup. Here's a neat visual and more info on the page where I found it:
No, it's just that democrats tend to drive faster than republicans because of their better cars and increased motivation to get out of red states
1
Sharlot @lemmy.world - 20hr
Best kind of science joke: funny and educational. Bonus points for making people think about Doppler before speeding.
14
iAmTheTot @sh.itjust.works - 1day
Hey I used I have one of these. Slightly different design though. Was always my favourite sticker.
12
NaibofTabr - 1day
If that sticker is blue, only the laws of physics can judge me.
12
FosterMolasses @leminal.space - 21hr
This was good, had a hearty chuckle
9
StinkyFingerItchyBum - 19hr
Mine was sensible.
2
Deceptichum - 1day
Half-Life
9
20cello @lemmy.world - 1day
Doppler
7
Devial @discuss.online - 1day
Make it green, and add the line "If this sticker is red, then I'm going too fast"
5
Bluewing @lemmy.world - 21hr
Light speed? No! Engage Ludicrous speed!
2
far_university1990 @reddthat.com - 17hr
Put on f-777
1
ChaoticNeutralCzech @feddit.org - 22hr
The color also depends on the ink's near-infrared reflectivity (since the sun and halogen headlamps emit infrared, that will get shifted into the red to green parts of the visible spectrum when red becomes blue)
io in science_memes @mander.xyz
bumper sticker
https://piefed.cdn.blahaj.zone/posts/Uk/Cl/UkClq0qiND9lCqw.jpeghttps://toot.cat/@SistaWendy/110313772260430178
Clever, I like it. I wonder how many people read it and have no clue what it means.
Exercise for the reader: Assuming average human eyesight, how many picoseconds away from a collision are you if you can read that size of text and the relative velocity between you and the car ahead of you is large enough that the red label is sufficiently blueshifted to look blue?
for 800nm to 400nm, we need gamma=2. So v~.86c. At 20m this gives you ~80ns.
For perspective, this speed is:
In one second, you would travel around:
Which is around 6.43 times around the Earth's equator.
But how many Olympic sized swimming pools full of jello?
About 3 large boulders the size of a small boulder.
Did you see the boulder post too?
We are all the size of boulders on this blessed day.
Depends on the flavor
So, some paint might get exchanged?
It was a graveyard graph.
The sticker should also say something like "But don't worry, we're going to be evaporated in a huge explosion anyway, due to the gigantic release of energy when you crash into my car in a few nanoseconds."
I want to know how fast you need to go to be color shifted on a traffic camera. The more I think about it the less likely getting enough light to be picked up by the camera might be an issue even with perfect placement
So 75000km/s is too fast? Boooo, get off the road grandad!
So is the reader fast or would it work the other way where the car with sticker is fast?
Even then, a BMW would tailgate and flash its headlights at you on a German autobahn.
Anyone would do that on an autobahn, get out of the passing lane slowpoke xD
Best thing is when small car from 1990 push away large bmw or porsche because they have 900 hp engine with dual turbo and nitrous injection.
I love sleeper car.
If the sticker is blue, one or the other of you is about to cease being biology and start being physics.
I am not sure i understand. Is it something to do with redshift?
Yup. Here's a neat visual and more info on the page where I found it:
https://i.imgur.com/kHeQyo0.gif
https://stickmanphysics.com/stickman-physics-home/unit-10-waves/doppler-effect/
Damn it. Imgur is blocked in the UK. Cant see that image.
you're going way too fast, shifting into UV now
UV is blocked in the UK.
Probably for the better. Even with it having Milla Jovovich, it wasn’t very good.
Oh, I didn't realize. I wanted to upload it, but Lemmy wouldn't let me, so I just picked somewhere. Try the original link:
https://stickmanphysics.com/wp-content/uploads/2020/03/Doppler-Effect-of-Light.gif
No, it's just that democrats tend to drive faster than republicans because of their better cars and increased motivation to get out of red states
Best kind of science joke: funny and educational. Bonus points for making people think about Doppler before speeding.
Hey I used I have one of these. Slightly different design though. Was always my favourite sticker.
If that sticker is blue, only the laws of physics can judge me.
This was good, had a hearty chuckle
Mine was sensible.
Half-Life
Doppler
Make it green, and add the line "If this sticker is red, then I'm going too fast"
Light speed? No! Engage Ludicrous speed!
The color also depends on the ink's near-infrared reflectivity (since the sun and halogen headlamps emit infrared, that will get shifted into the red to green parts of the visible spectrum when red becomes blue)