Donuts and Funhouse Mirrors
An Interactive Audio Lesson about the shape of the Universe
By Chris Uehlinger
Tutorial
This lesson can be controlled using a few different input methods:
- Keyboard - Press the right and left arrow keys to go forward and backward, press the "R" key to refresh.
- Click/Touch - Use the controls in the lower right corner to go forward, go backward and refresh
The Shape Of The Universe
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Review
- Our tiny universe has 100m2 of space.
- There is no edge.
- There is no center.
Review
Things that are still true:
- Our universe has no edge and no center.
- Expansion has no direction and is measured in (distance/time)/distance, not distance/time.
- The universe started from a point of infinite density.
The Math of Infinity
\( \frac{\infty kg}{100 m^2} = \infty \frac{kg}{m^2} \)
\( \frac{100 kg}{\infty m^2} = 0 \frac{kg}{m^2} \)
\( \frac{\infty kg}{\infty m^2} = ? \frac{kg}{m^2} \)
\( \frac{\infty kg}{\infty m^2} = \infty \frac{kg}{m^2} \)
\( \frac{\infty kg}{\infty m^2} = 0.00001 \frac{kg}{m^2} \)
Corrections
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Reviewed by Max Goldstein.
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