The elegant universe: quiz 2

How many dimensions does space-time have?

• 2

• 3

• 5

• 4

Draw the graph of the big bang after the singularity exploded.

What is a wormhole?

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Gravitational waves travel at the speed of _____.

What bends space-time?

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Will the planetary orbits in our solar system remain the same if the sun were to be replaced by an equally massive black hole?

• Yes.

• No.

• Maybe.

Which of these is a method currently used to detect black holes?

• Shine light on it.

• Hawking Radiation.

• Gravitational microlensing.

• Quantum entanglement.

What does Einstien call the happiest thought of his life?

• Black holes orbiting each other.

• A man falling from a tall building.

• Planetary orbits.

• Collision of black holes.

1 Light year is equal to?

• 150 million Km

• 6 trillion miles

• 2.371 trillion Km

• 9.5 trillion Km

Mark the event horizon (approximation).