Main content
Breakthrough Junior Challenge
Course: Breakthrough Junior Challenge > Unit 1
Lesson 3: 2015 Challenge — Physics- Special theory of relativity - 2015 Challenge Winner!
- A visualization of special relativity
- Chromatic aberration
- Orbital mechanics
- What is light?
- Special and general relativity
- The science of fireworks
- Quantum tunneling
- Antimatter
- Special Relativity
- What Einstein missed: The EPR paradox
- Virtual particles and gravity
- Interstellar and Hawking radiation
- All about superconductors
- Entropy and the direction of time
- Magnetism, light and the magneto optic Kerr effect
- The theory of everything
© 2023 Khan AcademyTerms of usePrivacy PolicyCookie Notice
The theory of everything
By Tristan Pang
The Theory of Everything/String Theory is one of the most important but complicated concepts in physics which unified everything in the universe. This discovery is important as it explains how, what and why all matter is what it is. It changed our understanding of everything and is crucial to our view of the universe. It’s not just a theory, but it’s a solution to problems in different areas of physics. Students of all ages should learn about it as this is strongly related to our future and can ultimately improve our world. It is an introduction to String Theory.
The Theory of Everything/String Theory is one of the most important but complicated concepts in physics which unified everything in the universe. This discovery is important as it explains how, what and why all matter is what it is. It changed our understanding of everything and is crucial to our view of the universe. It’s not just a theory, but it’s a solution to problems in different areas of physics. Students of all ages should learn about it as this is strongly related to our future and can ultimately improve our world. It is an introduction to String Theory.
Want to join the conversation?
At1:12, does he mean general relativity instead of gerieral relativity?(9 votes)
What is thory? Please explain in simple form(1 vote)
A theory is a supposition or a system of ideas intended to explain something, especially one based on general principles independent of the thing to be explained. I help that helped =)(6 votes)
What is the difference between Newton and Einstein? Why do some people argue that Einstein proved Newton's theory about gravity wrong?(2 votes)
First, Newton was before Einstein. That's always important to remember. Newton did what many had not been able to do before, which wwas to standardize the laws of physics into a system that works to describe the world as it was known back then. After a while, Einstein cam along and discovered that there was more to it than Newton thought. He discovered the extremely important relationsip energy has with light, which along with several other less-famous scientists, allowed us to understand much more about the way light, subatomic particles, and quantum physics work.
To sum it up...
Newton was the laws of thermodynamics and calculus.
Einstein was the general and special theory of relativity.(2 votes)
I find some aspects of this video misleading.
The theory of everything and the string theory are not the same thing.
The theory of everything is a hypothetical theory that would explain all the physics of the universe.
String theories (there are several ones) are candidates for this theory of everything. One problem with them is that they are so complicated that we don't know if they actually describe our universe.(0 votes)
You’re right! The theory of everything it a theory that would describe the forces of nature combined and our universe. String theory could lead us there, but we don’t know. It is not the complexity that makes it unknown, but I see how you wer thinking.(4 votes)
the universe expands faster and faster, right. Then you approved the Big Bang as a literal bang. My question is that if a bang did happen then how is the speed of expanding increasing as it clearly violates the laws of Newtonian Physics explaining that at one point the universe will stop increasing as only the force of the Big Bang is the only force pushing the universe apart.(1 vote)
What makes up the strings?(1 vote)- String theory is just a theory, so we don’t know what strings are made of, even if they are real.(1 vote)
When reading other sites, they mentioned that strings may attach to a 2D 'brane'... is that relevant to the theory, or just extra information? (If relevant, what do they do?)(1 vote)
Yeah it can be 2d, but I think the 2d's are made from 1d.... But forget my thinking, for a fact now the are 2d(1 vote)
What is Lambda?How is it so important? Why did Einstein use it in is theory E=Λmc^2?(0 votes)
what program are you using when you talk about the eleventh dimension?(0 votes)
what dose he really mean by this Theory*(0 votes)- Just like we pull a string of a guitar and it vibrates , producing sound. Similarly , imagine that you could do it with the universe. You just need to put energy out there in a "string" and instead of sounds, you get particles(1 vote)
1:12