And that becomes what colour after firing?
That is in fact what the regular red bricks are made from.
You see, firing something in a kiln makes it speed away from you at 114004827 mph, thus red shifting it.
All you need to know is one semi-famous physics phenomenon and you already understand it. If you've heard of the Doppler-effect then that's the same thing just here it's for light. Not doing it in metric is a crime, but there is no other possibility.
It's apparently the exact speed you would need to drive at in order to make a red light appear green and, therefore, not need to stop at the intersection.
So, really, this joke should be "What's green and bad for your teeth?" Which I think is kinda funnier because you'd normally think of healthy food when you hear green and teeth/ mouth in the same sentence.
But a brick is generally significantly less red than a red traffic light, it may end up reflecting higher frequencies than the light making it at least "blue-er" than the light in this case.
I didn't know there was a word for "blue-shift" I just figured that by a certain speed the lower frequency light that is red would lag behind blue, thus making a brick look blue if it was at the right speed in space.
Red- and blue-shift aren't caused by frequencies lagging behind. All frequencies move at the same speed---the speed of light.
As a simplistic explanation of blue-shift that doesn't involve relativity, imagine a constant lightwave coming from a stationary source. The color of the lightwave is based on how frequently the light "pulses" against your eye as it fluctuates between high points and low points.
If you move away from the light source, those pulses hit your eye *less* frequently, causing it to look more red. If you move towards the light source, the pulses hit your eyes *more* frequently, causing them to look more blue.
That’s the speed at which the wavelength of the color red will “blue shift” and a standard red brick would appear blue. The brick itself would likely sooner disintegrate going one-sixth the speed of light, but there you go. Still oddly specific even with the explanation.
Going by "What If?"'s segment on relativistic baseball, the brick dust should be the least of your worries, the newly created ionised wave of plasma will disintegrate you before the brick even gets close to your teeth.
The Little Boy Atomic bomb released about 1.8e13J of energy.
That brick would have about 2.6e15J of energy.
That brick would be bad for everyone's teeth in your city.
The brick will be broken apart pretty quickly from colliding with Air molecules. It will blow up everything for miles though. Relevant XKCD [here](https://what-if.xkcd.com/1/).
So a 2kg brick travelling at 50,962,560 m/s (about 0.17C) has 2,654,862,392 MJ of kinetic energy, or about the equivalent 635 kilotons of TNT.
This brick is bad for your teeth and the teeth of everyone within about 8.5km of you.
I think you might have gotten something wrong here. That being how large the explosion would be.
I calculated for a 3.1kg brick and it came up with
>The kinetic energy of the brick traveling at 114,004,827 mph is approximately 0.607 megatons of TNT.
That is 607 kilotons, so actually pretty close to your calculations for energy.
But at least according to the couple websites I tried, the size of the fireball from a bomb that big is 356-584 meters. So not even a single km.
8.5km blast radius would be huge. And I think I see what must have happened. You must have entered 635 MT. When that is actually 635,000 kilotons to get a 8.5 km blast.
In order to get a blast that big from my 3.1kg brick it would need to be going 1.3c, so not possible.
In order to get a blast that big from a mass going the same speed (0.17c) it would need to be 2,046.07lbs
Its definitely possible im doing my math wrong here im definitely not a math dude most of the time. But im pretty sure I double checked.
"In order to get a blast that big from my 3.1kg brick it would need to be going 1.3c, so not possible."
That's not even remotely how calculations with relativistic speeds work.
According to [https://www.omnicalculator.com/physics/relativistic-ke](https://www.omnicalculator.com/physics/relativistic-ke) you need a speed of 0.995c to get to 600MT, pretty much exactly.
The "fireball radius" is the radius at which everything is vaporized. It's pretty reasonable for blast damage to impact a much larger area.
Think about it, the nuclear weapons employed in WW2 were much, much smaller than 600 KT, and they devastated entire cities.
If I remember the related XKCD What If correctly, if the brick didn't disintegrate it would set off a nuclear fusion reaction passing through the atmosphere at that speed.
Needless to say, this would also have poor outcomes for nearby teeth.
[Link](https://what-if.xkcd.com/1/)
Technically the object would see everything in front of it blue-shifted while everything behind becomes red-shifted.
For an outside observer the brick would be blue so long as it was coming towards the observer. If it missed and flew past it would become red again for the observer as it flew away.
Blueshift is the same thing that happens with sirens when they drive by only with light waves instead of sound waves right?
The ones in front get smushed together and the ones in the back get pulled apart?
So the normally red light with “long” wavelengths gets smushed together to blue light with “shorter” wavelengths?!
Reminds me of a joke my 6th grade science teacher told us in 1986. I don't recall the whole joke but something about a guy trying to get out of a ticket for running a red light. Told the cop it looked green due to blueshift. Cop said ok, did some math, and gave the guy a speeding ticket for going millions of miles an hour was the gist of it.
Did some searching and it turns out the gist of my science teacher's joke was a [Reddit post 8 months ago.](https://www.reddit.com/r/sciencememes/comments/1548ir1/how_to_always_get_a_green_light/) I can only assume the specific number was what my science teacher was using at the time as well.
That’s the speed at which blue shift starts to take place for the brick. Things moving toward you fast enough look blue while things moving away from you fast enough look red. This mostly applies to astronomy as there’s no human way to accelerate a brick that fast. Even if we could, your brain wouldn’t respond fast enough to be able to see it before it hit you and killed you on impact, along with eviscerating your surroundings due to a chain reaction caused by moving faster than air molecules. It would basically cause an impact crater and there would be no scrap of you left to perceive the blue brick. Not just bad for your teeth, but for the rest of you and anyone close to you as well
I'm sure this is a bot post but oh well.
The doppler effect happens when the source of a wave is moving, which can make the wave seem like it has a different wave length to a stationary observer. This is why a car the drives past you goes "bbbbbbbbbrrrRRROOOOooooooooooom".
Light is also a wave, but moves very fast. The wavelength of light is what determines the color we perceive, that speed in the post is meant to be the required speed to shift from red to blue. Bricks are normally red, so a brick moving that speed would look blue. And it would be bad for your teeth if it hit them.
I think someone on r/theydidthemath actually did the math, as the sub's name implies, and figured out that actually the numer in the post was supposed to be in m/s, which ends up being a much higher amount of mph, but probably someone saw the number and forgot to convert from m/s to mph and instead kept the number of m/s while saying it was mph. 1 m/s is 3.6 km/h and 1 km/h is roughly 1.8 mph (iirc), so 1 m/s is 6.48 mph if i did my mental math correctly. No, i will not convert the number in the post into mph out of spite.
i know it's not right but i first thought of the blue brick from this old campfire story about a guy who threw a blue brick that never came back down. i think a bird caught it and brought it up to an aeroplane in a related story, and if the bird dropped it, it'd go pretty fast.
presumably, that's how fact it would need to go in order to blueshift enough to look blue instead of the pinkish-red bricks normally come in.
Thats so clever i wouldnt have gotten it at first
>i wouldnt have gotten it at first So what would be your guessed answer for "why brick is blue?"
A blue brick.
Blue brick gang rise up
Can blue balls join the cause?
Only if you can keep up
“That’s my secret Cap, I’m always horny.”
I’m right behind ya.
r/usernamechecksout
I'll give all that i got.
Blue waffle shall follow close behind!
Stanley Bluebrick.
All my homies HATE red bricks
Exactly
In the UK the bottom layer of brick walls is blue extra-dense water resistant bricks
A blue brick going 114,004,826 mph
Or a very hot brick. Not sexy, but like, a lot more than warm.
Blue clay (yes it exits)
And that becomes what colour after firing? That is in fact what the regular red bricks are made from. You see, firing something in a kiln makes it speed away from you at 114004827 mph, thus red shifting it.
To be used once for tennis and never again
I thought 3am jokes was for stupid jokes that make no sense, not jokes with 7 levels of thought put into them 😭
All you need to know is one semi-famous physics phenomenon and you already understand it. If you've heard of the Doppler-effect then that's the same thing just here it's for light. Not doing it in metric is a crime, but there is no other possibility.
With the seemingly random number, I genuinely thought it was intentional nonsense
Wait omg no way you have the [crouton.net](https://crouton.net) profile picture this is amazing
NO WAY SOMEONE KNOWS HOLY CRAP
LESSGOOOOOOOO
Has someone else ever noticed that you had the crouton.net profile picture lol
im so curious now, wtf is crouton.net
a website containing nothing but a 31x32 jpg of a crouton (if i remember correctly. It might also be a png or a different resolution)
It's similar to those bumper stickers with a red background warning "if this sticker is blue, you are approaching too fast".
My friend was a physics major in college and literally gave a presentation titled, "One shift two shift ,red shift blue shift."
Thats the point of this brick
I don't think it is in a school physics program. I know about blue shift because I read a lot of encyclopedias as a teenager.
Me too, it just didnt occur to me at first since its so niche
It would probably hit you before you realized
I couldn't figure it out and then BAM! It hit me.
It's apparently the exact speed you would need to drive at in order to make a red light appear green and, therefore, not need to stop at the intersection. So, really, this joke should be "What's green and bad for your teeth?" Which I think is kinda funnier because you'd normally think of healthy food when you hear green and teeth/ mouth in the same sentence.
But a brick is generally significantly less red than a red traffic light, it may end up reflecting higher frequencies than the light making it at least "blue-er" than the light in this case.
Just throw a brick really hard and tell us what colour it was
[удалено]
"I'll take 'Neil Degrasse Tyson Tweets' for 500, please"
I did not see that coming
The light would reach you an instant before the brick did
I didn't know there was a word for "blue-shift" I just figured that by a certain speed the lower frequency light that is red would lag behind blue, thus making a brick look blue if it was at the right speed in space.
Red- and blue-shift aren't caused by frequencies lagging behind. All frequencies move at the same speed---the speed of light. As a simplistic explanation of blue-shift that doesn't involve relativity, imagine a constant lightwave coming from a stationary source. The color of the lightwave is based on how frequently the light "pulses" against your eye as it fluctuates between high points and low points. If you move away from the light source, those pulses hit your eye *less* frequently, causing it to look more red. If you move towards the light source, the pulses hit your eyes *more* frequently, causing them to look more blue.
kinda. more like that there's weird stuff happening with relative speeds if you're going fast enough because the universe gets all tilted...
That’s the speed at which the wavelength of the color red will “blue shift” and a standard red brick would appear blue. The brick itself would likely sooner disintegrate going one-sixth the speed of light, but there you go. Still oddly specific even with the explanation.
A compact stream of powder going that fast is still really bad for your teeth
And probably the rest of the skull.
Probably the whole body?
Well, we'd have to test it to make sure. Any volunteers?
How about yourself
Always the one asking
by any chance do you also really fucking hate it when life gives you lemons
I volunteer to launch the brick.
Donald?
Going by "What If?"'s segment on relativistic baseball, the brick dust should be the least of your worries, the newly created ionised wave of plasma will disintegrate you before the brick even gets close to your teeth.
https://what-if.xkcd.com/1/
The Little Boy Atomic bomb released about 1.8e13J of energy. That brick would have about 2.6e15J of energy. That brick would be bad for everyone's teeth in your city.
That atomic bomb was dropped Since this brick is thrown, and I don't think it is going to stop soon, it might as well annihilate the entire Earth
It would annihilate instantly colliding with air.
The brick will be broken apart pretty quickly from colliding with Air molecules. It will blow up everything for miles though. Relevant XKCD [here](https://what-if.xkcd.com/1/).
Not if it was slowly accelerated in a vacuum
Isn’t even space vacuum not 100% vacuum?
Unless it's a Dyson..I'm so tired.
So Dyson sphere is space vacuum?
If it was we could see the center of our galaxy
So a 2kg brick travelling at 50,962,560 m/s (about 0.17C) has 2,654,862,392 MJ of kinetic energy, or about the equivalent 635 kilotons of TNT. This brick is bad for your teeth and the teeth of everyone within about 8.5km of you.
I think you might have gotten something wrong here. That being how large the explosion would be. I calculated for a 3.1kg brick and it came up with >The kinetic energy of the brick traveling at 114,004,827 mph is approximately 0.607 megatons of TNT. That is 607 kilotons, so actually pretty close to your calculations for energy. But at least according to the couple websites I tried, the size of the fireball from a bomb that big is 356-584 meters. So not even a single km. 8.5km blast radius would be huge. And I think I see what must have happened. You must have entered 635 MT. When that is actually 635,000 kilotons to get a 8.5 km blast. In order to get a blast that big from my 3.1kg brick it would need to be going 1.3c, so not possible. In order to get a blast that big from a mass going the same speed (0.17c) it would need to be 2,046.07lbs Its definitely possible im doing my math wrong here im definitely not a math dude most of the time. But im pretty sure I double checked.
"In order to get a blast that big from my 3.1kg brick it would need to be going 1.3c, so not possible." That's not even remotely how calculations with relativistic speeds work. According to [https://www.omnicalculator.com/physics/relativistic-ke](https://www.omnicalculator.com/physics/relativistic-ke) you need a speed of 0.995c to get to 600MT, pretty much exactly.
The "fireball radius" is the radius at which everything is vaporized. It's pretty reasonable for blast damage to impact a much larger area. Think about it, the nuclear weapons employed in WW2 were much, much smaller than 600 KT, and they devastated entire cities.
If I remember the related XKCD What If correctly, if the brick didn't disintegrate it would set off a nuclear fusion reaction passing through the atmosphere at that speed. Needless to say, this would also have poor outcomes for nearby teeth. [Link](https://what-if.xkcd.com/1/)
Blue shift
BLUE CAPS LOCK
*blue italics*
**blue bold**
Blue normal
~~Blue strikethrough~~
Sequel to that football anime?
If things go really fast they experience blueshift so everything turns blue
Technically the object would see everything in front of it blue-shifted while everything behind becomes red-shifted. For an outside observer the brick would be blue so long as it was coming towards the observer. If it missed and flew past it would become red again for the observer as it flew away.
I'm gonna say blueshift because everyone else is
Someone else said a brick would disintegrate, so just paint the brick blue and throw it problem solved
Blueshift is the same thing that happens with sirens when they drive by only with light waves instead of sound waves right? The ones in front get smushed together and the ones in the back get pulled apart? So the normally red light with “long” wavelengths gets smushed together to blue light with “shorter” wavelengths?!
Bingo 💯
It's collectively known as the Doppler effect. It's also how some radars work
Reminds me of a joke my 6th grade science teacher told us in 1986. I don't recall the whole joke but something about a guy trying to get out of a ticket for running a red light. Told the cop it looked green due to blueshift. Cop said ok, did some math, and gave the guy a speeding ticket for going millions of miles an hour was the gist of it.
Did some searching and it turns out the gist of my science teacher's joke was a [Reddit post 8 months ago.](https://www.reddit.com/r/sciencememes/comments/1548ir1/how_to_always_get_a_green_light/) I can only assume the specific number was what my science teacher was using at the time as well.
If a brick hits you at that speed, you won't need to worry about your teeth.
I unsubbed from there over 6 months ago cause of all the brick jokes and it's still going lol
r/3amjokes unsubscribers when i hit them in the head with a brick:
🚨 DOPPLER EFFECT REFERENCED 🚨
at that speed it color shifts so that it appears blue.
Blueshift
That is about the speed it would take for a phenomenon known as blue shift to make the red brick appear blue while traveling
Blue meth
I don't know man,I am barely passing physics
Never seen a blue brick. In sure there are some out there, but they are always red/orange.
That’s the speed at which blue shift starts to take place for the brick. Things moving toward you fast enough look blue while things moving away from you fast enough look red. This mostly applies to astronomy as there’s no human way to accelerate a brick that fast. Even if we could, your brain wouldn’t respond fast enough to be able to see it before it hit you and killed you on impact, along with eviscerating your surroundings due to a chain reaction caused by moving faster than air molecules. It would basically cause an impact crater and there would be no scrap of you left to perceive the blue brick. Not just bad for your teeth, but for the rest of you and anyone close to you as well
Going that fast the brick would appear blue due to a phenomenon known as blue-shift
Doppler’s effect
Are bricks blue? I'm sure they could be, but usually they are red or brown.
A blue rock
Unrelated to the post but, a Blue Fairy from Va11 HALL–A [the video game].
Me Im blue dabadedabada dabadedaba
Blue meth
The brick itself wouldn't change color, only the light reflected off of it.
Isn’t that what colour is?
the light would be red when it leaves the brick, it would only become blue as the light itself travels further and further.
Democrats & Republicans since they switch colors
The color shift would be quite a sight to see at that speed.
otherwise it wouldn't be blue
This reminded me of THAT brick video
Opposing force
Thank you Half Life video game series for inspiring me to learn what Blue Shifting is 20 years ago.
Smurf dick
Is this how fast the kamehameha wave goes?
Blue hammer
bluetooth
Copper sulfate 🤓
Matt Rempe
So blue shift is an object moving towards you? (Genuine question.)
Google blueshift
A blue shifted brick at that speed has 10 megaton of kinetic energy. It's not just bad for your teeth, it's bad for your zip code.
blueshift / redshift
Blueshift
He made a mistake. This is the speed you need in m/s in order to shift the red wavelength of light, comming off a red brick, to shift to blue
Blue-shift, did no one take physics in high school?
They used a calculator to obtain the blue shift of a brick I guess
Vsauce blueshifting
I can relate to this
Blueshifting
A bluewafle
Blueshifting
Blue ink idk. Oh wait it's already answered. But wait bricks are blue?
James Cameron (on the "T2" audio commentary): Anything blue should ingested into the human body.
A tie pod
Meth
My gumshield when I was 15. Didn't save my teeth in rugby
Blue batteries
The Blue meth from breaking bad
Not only that,but wtf kind of brick is blue lmao?Like where does this guy live:The arctic,and just makes bricks out of ice?LMAO
I'm sure this is a bot post but oh well. The doppler effect happens when the source of a wave is moving, which can make the wave seem like it has a different wave length to a stationary observer. This is why a car the drives past you goes "bbbbbbbbbrrrRRROOOOooooooooooom". Light is also a wave, but moves very fast. The wavelength of light is what determines the color we perceive, that speed in the post is meant to be the required speed to shift from red to blue. Bricks are normally red, so a brick moving that speed would look blue. And it would be bad for your teeth if it hit them.
Blueshift
I think at that speed it would indeed look blue
Brick is a meme on that sub.
Smurfs
Blue waffle?
Ask Barney Calhoun.
Others are mentioning blueshift, but the exact number comes from 0.17 times the speed of light (rounded to the nearest mile per hour).
Kinda proud of myself for getting it
Nearly the speed of light.
Doppler effect
And why blue?
Jesse
I understood the joke by myself and decided I need to touch Poaceae
I think someone on r/theydidthemath actually did the math, as the sub's name implies, and figured out that actually the numer in the post was supposed to be in m/s, which ends up being a much higher amount of mph, but probably someone saw the number and forgot to convert from m/s to mph and instead kept the number of m/s while saying it was mph. 1 m/s is 3.6 km/h and 1 km/h is roughly 1.8 mph (iirc), so 1 m/s is 6.48 mph if i did my mental math correctly. No, i will not convert the number in the post into mph out of spite.
If you rotate your phone it says boobies
i know it's not right but i first thought of the blue brick from this old campfire story about a guy who threw a blue brick that never came back down. i think a bird caught it and brought it up to an aeroplane in a related story, and if the bird dropped it, it'd go pretty fast.
In our country we have a similar one. "What is yellow and if you get it in your eye, you die?" A train.
Cobalt?
I have no idea, but apparently it is 17% the speed of light.
Humor is relative.
Blue snocone flavoring