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In the “good guys vs. bad guys” example done in lecture, the good guys’ ship traveled away from the bad guys’ home planet at 0.6c after the signing of the treaty. In the frame of reference of the bad guys’ planet, where was the good guys’ ship after it had been traveling for 5 years?
ByAdmin9. Question 9 In the “good guys vs. bad guys” example done in lecture, the good guys’ ship traveled away from the bad guys’ home planet at 0.6c after the…
What is Einstein’s equivalence principle?
ByAdmin6. Question 6 What is Einstein’s equivalence principle? 1 point  That the special theory of relativity is equivalent to the general theory of relativity. That an accelerated frame of…
Consider two identical light clocks, designed as explained in lecture. Bob has one, and Alice takes the other on her spaceship and flies by Bob at speed V. Bob observes Alice’s clock. What is the relationship between the duration of one tick on Bob’s clock and the duration of one tick on Alice’s clock, according to Bob (where γ represents the Lorentz factor)? (Tip: Think about the light clock diagram and the value of the Lorentz factor.)
ByAdmin9. Question 9 Consider two identical light clocks, designed as explained in lecture. Bob has one, and Alice takes the other on her spaceship and flies by Bob at speed…
Consider a train with three cars, moving to the right past Alice, who is on a train station platform. The front of the first car reaches Alice at time t = 0. In Alice’s frame of reference, which set of world lines represents the world lines of the three cars? (Let a world line represent the front of the car.)
ByAdmin7. Question 7 Consider a train with three cars, moving to the right past Alice, who is on a train station platform. The front of the first car reaches Alice…
What is a non-inertial frame of reference?
ByAdmin11. Question 11 What is a non-inertial frame of reference? 1 point  It is a frame of reference that moves sideways compared to another frame of reference. It is…
Imagine that Bob, at a spaceport, observes Alice flying by to the right in her spaceship at a velocity of 0.9c. When Alice’s ship had been previously docked at the spaceport, Alice had measured its length as 100 meters. Alice has five clocks on her spaceship: one in front (at 0 meters), one at 25 meters, one at 50 meters, one at 75 meters, and one at the rear at 100 meters. All the clocks are synchronized in Alice’s frame of reference. When Alice flies by Bob, Bob uses his lattice of synchronized clocks to take simultaneous photos of Alice’s clocks (simultaneous in Bob’s frame of reference). Bob compares the times shown in the photos of Alice’s second clock (at 25 meters) and fourth clock (at 75 meters). Which clock is running ahead of the other?
ByAdmin6. Question 6 Imagine that Bob, at a spaceport, observes Alice flying by to the right in her spaceship at a velocity of 0.9c. When Alice’s ship had been previously…