Professor Dave Explains
Special Relativity Part 3: Length Contraction
Time dilation was pretty weird, huh? Well we aren't done yet! Time is relative, and so is space! Different observers measure different lengths for objects and journeys. Weird stuff!
Professor Dave Explains
Special Relativity Part 4: Mass-Energy Equivalence or E = mc^2
Everyone and their mom knows about E = mc^2, it's the most famous equation in science, and there are plenty of posters you can buy for your dorm room with Einstein's face and this equation floating mysteriously around his head. But what...
Curated Video
What Would Happen If You Traveled At The Speed of Light?
If you travel at the speed of light, your mass will increase exponentially. The speed of light is 300,000 kilometers per second (186,000 miles per second). When you move at this speed, your mass will become infinite. Therefore, infinite...
Physics Girl
Special Relativity and the Twin Paradox
How can just two rules of Einstein's 1905 theory of special relativity lead to seemingly paradoxical changes in the perception of time? Want exclusive updates whenever a new video is posted? Special relativity was one of the first...
Astrum
What happens as you approach the speed of light?
As you go faster, what happens to time and space? What would happen if you could manage to go the speed of light? Astrum Answers!
Bloomberg
Atomic Clocks Are Reinventing Time
Feb.19 -- Though humans don't experience it in their daily lives, gravity and movement can change how time elapses. Ultra-precise atomic clocks are now able to measure these tiny changes, known as time dilation. It's a technological...
Curated OER
Einstein's Relativity (2): Time Dilation-Slowing Down Clocks
What does the EM stand for in terms of physics? Learners are introduced to the EM, Einstein's relativity, light years, and the speed of light in terms of relativity. Good examples and concrete visuals guide viewers through the complex...
Curated OER
Einstein's Relativity (3): The Famous Equation E=mc2
Time dilates, contracts, is relative, and can travel? Yes, all these components of Einstein's Theory of Relativity have been validated in the scientific community through extensive experimentation. What have they learned? Discover...