In a spacetime diagram, what does a vertical world line represent?
The Unruh Effect

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Physics, Science
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11th Grade - University
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Hard
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
An object not moving at all.
An object with constant velocity.
An object accelerating.
An object moving at the speed of light.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What happens to an observer's causal access to the universe when they accelerate?
It expands to include more of the universe.
It remains unchanged.
It becomes infinite.
It is cut off from a region of the universe.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What shape does a world line take for an observer undergoing constant acceleration?
A straight line
A circle
A hyperbola
A parabola
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the Rindler Horizon?
A boundary around a black hole.
A type of event horizon created by constant acceleration.
The edge of the observable universe.
A line on a spacetime diagram.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How does the Unruh effect differ from Hawking radiation?
Unruh effect occurs only near black holes, Hawking radiation does not.
Unruh effect is observer-dependent, Hawking radiation is not.
Unruh effect requires general relativity, Hawking radiation does not.
Unruh effect is seen by all observers, Hawking radiation is not.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the source of energy for the Unruh particles detected by an accelerating observer?
The observer's velocity.
The observer's acceleration.
The observer's mass.
The observer's position.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is required to increase the temperature by a single degree Kelvin due to Unruh radiation?
Acceleration at a rate of 10^10 m/s²
Acceleration at a rate of 10^15 m/s²
Acceleration at a rate of 10^20 m/s²
Acceleration at a rate of 10^25 m/s²
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