Relativity: Space, Time, and Gravity
Like Duolingo, but for Relativity: Space, Time, and Gravity. Tomo turns the whole topic into a game you play five minutes a day, until it actually sticks.
For the part of you with thirty open tabs that never became anything.
87 levels across 8 sections, about 174 minutes end to end, roughly 35 days at five minutes a day. It moves through The Foundations of Special Relativity; The Geometry of Spacetime; Mass, Energy, and Momentum; The Leap to General Relativity; The Einstein Field Equations; Extreme Gravity and Black Holes; Cosmology and Large Scale Structure; and The Limits of Relativity. It assumes you already know the basics.
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Key ideas in Relativity: Space, Time, and Gravity
- Light speed is invariant
- Null result of Michelson-Morley
- Einstein's postulate and frames of reference
- Interferometry and light direction
- Light is a self-propagating electromagnetic wave requiring no medium
- The constancy of light speed regardless of observer motion
- The vacuum of space is truly empty, not filled with a hidden substance
- Relativistic velocity addition prevents any sum from exceeding c
- The outcome and significance of the Michelson-Morley experiment
- At low speeds, simple addition is a close enough approximation
- Causality is limited by the speed of light; no signal travels faster
- Light's ability to travel without a physical medium
- Information and light share the same maximum speed through the universe
- The non-linear nature of velocity addition near light speed
- Light speed as the universal limit for information transfer
- Simultaneity is relative to the observer's state of motion
You've tried the other tabs
Thirty open tabs. Four facts you actually kept.
You watched. You nodded. By Sunday it was gone.
One answer, then back to scrolling.
Eight weeks. You meant to finish. You didn't.
Tomo gives Relativity: Space, Time, and Gravity the Duolingo treatment: levels, streaks, and quick quizzes that test what you just learned. That game loop is what the tabs above never had, so it's the one you actually finish.
Here's what playing it feels like
A real question from this course. Take your best guess.
What did the 'null result' of the Michelson-Morley experiment ultimately prove about the universe?
Get it right to open this lesson and 86 more in the app.
Where Relativity: Space, Time, and Gravity takes you
Master the fabric of the universe by exploring how Einstein redefined reality, from the speed of light to the curvature of spacetime.
- 1
The Foundations of Special Relativity
- The Constant Speed of Light
- The Death of Absolute Simultaneity
- Time Dilation in Motion
- 2
The Geometry of Spacetime
- Length Contraction
- Minkowski Diagrams
- The Invariant Interval
- 3
Mass, Energy, and Momentum
- Relativistic Momentum
- Mass-Energy Equivalence
- 4
The Leap to General Relativity
- The Equivalence Principle
- Curved Spacetime
- Non-Euclidean Geometry
- 5
The Einstein Field Equations
- The Stress-Energy Tensor
- Solving for the Metric
- 6
Extreme Gravity and Black Holes
- The Schwarzschild Radius
- Gravitational Time Dilation
- Frame Dragging
- 7
Cosmology and Large Scale Structure
- Gravitational Lensing
- Gravitational Waves
- The Expanding Universe
- 8
The Limits of Relativity
- The Singularity Problem
- Relativity vs. Quantum Mechanics
- The Search for Quantum Gravity
8 sections · 22 units · 87 levels. Built to play, not to enroll.
You pick the voice
Relativity: Space, Time, and Gravity is taught in the The Professor style: clear, structured, thorough. Want a different feel? In the app you can spin up the same topic in any of Tomo's teaching styles. Same facts, totally different vibe.
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