Practice Test

Please solve the following questions. This is not a real exam, it will not be graded, and you do not need to submit your solutions to anyone. The questions are simply intended to help you practice for the real exam.

These questions will not appear in the exam itself. Students who don't genuinely attempt to solve the questions on their own, and only memorize the solutions, will have a very hard time in the actual exam!

This sample exam is online, but the real exam will be given in person, at a time and place indicated on the course website.

THIS IS NOT THE ACTUAL EXAM!
THIS IS JUST A PRACTICE EXAM!
THE REAL EXAM IS IN PERSON!

If you need any clarifications for these questions, you can ask for them on the course Teams channel.

Question 1

I live on the 24th floor. Compared to my friend who lives on the 12th floor, I experience time...




Question 2

The relative velocity between Alice and Bob corresponds to a Lorentz factor of 5. Alice measures a proper time of 2 seconds between two events. How much time does Bob measure?




Question 3

I live on the 23rd floor, and my friend lives on the 15th floor. If I send a radio wave to my friend, the wave will be...




Question 4

What is the difference between the weak equivalence principle and the Einstein equivalence principle?




Question 5

Galaxy A is twice as far from us compared to Galaxy B. According to Hubble's law, this means that Galaxy A...




Question 6

What is an Einstein ring?




Question 7

What was the source of the gravitational wave event GW150914?




Question 8

What will be the advantage of putting a gravitational wave detector in space compared to detectors on Earth?




Question 9

What is the Einstein cross?




Question 10

The expansion of the universe is...




Question 11

Which of the following is a stellar black hole?




Question 12

In Einstein's special theory of relativity, the speed of light in vacuum...




Question 13

According to Kepler's second law, stars farther from the center of a galaxy should rotate...




Question 14

What was the significance of the gravitational wave event GW150914?




Question 15

How did the Hulse-Taylor pulsar provide evidence for gravitational waves in 1974?




Question 16

How did LIGO provide evidence for gravitational waves in 2015?




Question 17

In Eddington experiment, why was it important to measure the position of the stars at nighttime before the eclipse?




Question 18

Why don't we notice special-relativistic effects like time dilation in our daily lives?




Question 19

The Schwarzschild radius of a black hole with 10 solar masses is around 30 km. What is the Schwarzschild radius of a black hole with 30 solar masses?




Question 20

Which of the following objects bends spacetime the most?




Question 21

Which of the following was observed by the Event Horizon Telescope?




Question 22

Geodesics outside the event horizon...




Question 23

You are jumping from a tree down to the ground. According to Newtonian mechanics, while you are falling, you're...




Question 24

The general-relativistic prediction for the perihelion precession of Mercury was...




Question 25

Before the cosmic microwave background was released, the universe was...




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