These very strange universes could theoretically be possible

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Physics, Science
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11th Grade - University
•
Hard
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What happens to light in a wrap-around universe?
It reflects back to the source.
It gets absorbed by the boundaries.
It continues infinitely without boundaries.
It changes color as it travels.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In a 3D wrap-around universe, what happens when you pass through one face of the cube?
You reappear on the opposite face.
You see a reflection of yourself.
You exit the universe.
You get stuck in a loop.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is believed to describe the geometry of our universe?
Spherical
Flat
Hyperbolic
Torus
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is unique about the 16-turn space?
It has no boundaries.
It is a cube with a half twist.
It is non-orientable.
It involves a 60-degree rotation.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How does the Klein bottle differ from other Euclidean manifolds?
It is orientable.
It has a side-to-side flip.
It is infinite in all directions.
It has uniform curvature.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is a characteristic of a non-orientable universe?
It is a perfect sphere.
It is infinite.
It has a side-to-side flip.
It has uniform curvature.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why is it challenging to observe copies of our solar system in a flat universe?
The universe is not flat.
The universe is too small.
Light travels too slowly.
Copies are too far apart.
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