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Course: Algebra 1 > Unit 3
Lesson 3: Word problems with multiple unitsCreativity break: How are math and creativity changing the world?
Experts share examples of how math and creativity are changing the world. Created by Khan Academy.
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- I'm wondering how was the first image of a black hole obtained.(20 votes)
- Because there aren't any standalone telescopes large enough to capture an image of a black hole, scientists figured out a way to link up many telescopes around the globe, resulting in a mega-lens the size of the Earth's diameter. Then they just had to pinpoint the exact location of a black hole using clever technology that could find invisible objects emitting X-rays.
*An X-ray is a form of electromagnetic radiation. They can be emitted from black holes when they compress gasses, which raise the surrounding temperature to the point that they emit X-rays(7 votes)
- easy energy points right here lol(11 votes)
- thats what i said haha(5 votes)
- Wow the fact that that’s true is crazy(9 votes)
- why is it not submitting after i do it(4 votes)
- go back to the first 3 srcconds(2 votes)
- I bet nobody watched this(3 votes)
- Easy energy points. Anyway YOU watched it!(I need tesla anyway)(4 votes)
- What is the others use of energy points other than unlock those cute looking avatars ?(4 votes)
- How long ago was this picture taken?(3 votes)
- my favorite thing with science and math is the James web telescope and how it took a picture of a galaxy 13 billon light years away(2 votes)
- did anyone notice the cute drawings on Dr. Saad's white board ?(1 vote)
- Math is changing the world for the worst. Math stands for...
M - MENTAL
A - ABUSE
T - TO
H - HUMANS(0 votes)- But if you understand it, you feel a sense of pride in your achievements. If you don't, then yes it gets aggravating, but all the more reason to keep trying to master it.
M - Mistakes
A - Allow
T - Thinking to
H - Happen(18 votes)
Video transcript
(light music) (typewriter typing) - Maths underpins
everything in our universe, so it impacts every corner of our society. But over the past decade in particular, the advances in computer technology and the introduction of machine learning and artificial intelligence
has been massive. And we're only learning more and more and building better and better systems. And maths underpins all of that and it's fundamental to
all of those systems. And in fact, computer science
is inherently linear algebra, so it's really foundational
to those scientific advances. - One relatively recent example that really inspired me
was the first real photo that scientists were able
to capture of a black hole, those mysterious remnants
of giant stars that lurk all over the universe. And it is the way the scientists
used creativity and math to solve the problem
that was so fascinating. You see, these black holes are do distant that there is no single
telescope that is large enough to be able to actually see them. And the scientists came
up with this clever idea, creating a network of small
telescopes distributed all across the globe
that were synchronized to capture and focus the
same object at the same time, creating a giant virtual telescope. Now, the aperture of this
giant virtual telescope is nearly the same size as
the diameter of the Earth. And with that in place, the scientists and engineers
were able to capture all the bits and pieces of data and put it all together
into the first image of a black hole that is
53 million light-years, which is 318 quintillion miles away. Now, that's an impressive
use of creativity and maths. (light music continues)