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Relativity & Quantum Theory in Modern Physics Chapter Exam

Exam Instructions:

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

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Question 1 1. In the train thought experiment, two beams of light are fired from the center of a moving train car: one beam of light towards the front of the train and one towards the back. From the perspective of a person on the side of the tracks, watching the train, which beam of light reaches the edge of the train car first?

Question 2 2. Fill in the blank: According to the Heisenberg Uncertainty Principle, the more precisely you know the velocity of a particle the _________________ the position of a particle.

Question 3 3. A spaceship is moving at 0.8 times the speed of light relative to the Earth. If the spaceship has a mass of 800 kilograms, what is the ship's relativistic mass when it is moving at its maximum speed?

Question 4 4. Which of these is not true regarding the speed of light?

Question 5 5. A train is moving at 0.1c relative to the Earth. If 500 seconds tick by on a passenger's watch, how many seconds have passed at a nearby train station?

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Question 6 6. Which of the following statements about special relativity is FALSE?

Question 7 7. One consequence of general relativity says that the _____________mass is equal to the _____________ mass.

Question 8 8. Which of the following is not a consequence of special relativity?

Question 9 9. An AU is an:

Question 10 10. How was time dilation proven?

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Question 11 11. In the equation F = ma, what kind of mass is m?

Question 12 12. A spaceship is moving at 0.3 times the speed of light relative to the Earth. If the spaceship has a length of 10 meters, how long will it appear when observed from the Earth?

Question 13 13. You are sitting on a train moving at 3 m/s, on a planet that is moving at a velocity of 450 m/s around its star, a star that is moving at 63,000 m/s around its galaxy, a galaxy that is moving at 1,000,000 m/s towards another galaxy. What is your velocity?

Question 14 14. What is quantum theory?

Question 15 15. Which of the following is NOT a main idea behind the special theory of relativity?

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Question 16 16. What is a wavefunction?

Question 17 17. Which of the following is NOT a consequence of general relativity that was covered in this lesson?

Question 18 18. Which of the following is NOT an application of quantum theory in the real world?

Question 19 19. Which of the following is NOT something that quantum theory helps explain?

Question 20 20. A spaceship is orbiting the Sun at a radius of 50,000 meters for 500 seconds. If the mass of the Sun is 2 x 10^30 kilograms, how much time passed at another location a long way away from the Sun?

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Question 21 21. Who came up with the special theory of relativity?

Question 22 22. The time that has passed between when light was originally emitted by a source and when we detect it on Earth is known as the:

Question 23 23. The distance light (any form of electromagnetic radiation) travels through a vacuum in one year is known as (a):

Question 24 24. What is general relativity?

Question 25 25. How many miles does one light year represent (round to the nearest whole number)? Hint: 1 mile = 1.61 km.

Relativity & Quantum Theory in Modern Physics Chapter Exam Instructions

Choose your answers to the questions and click 'Next' to see the next question. You can skip questions if you would like and come back to them later with the "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. You will lose your work if you close or refresh this page. Good luck!

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