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If Alice travels from Earth to the center of the galaxy in ten (10) years, and the distance to the center of the galaxy in the Earth frame of reference is 30,000 light years, how far is it (approximately) from Earth to the center of the galaxy from her perspective?
ByAdmin1. Question 1 If Alice travels from Earth to the center of the galaxy in ten (10) years, and the distance to the center of the galaxy in the Earth…
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 as Alice flies by. Which of the following statements is true?
ByAdmin7. Question 7 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…
In the twin paradox example done in lecture, it seems that Alice’s and Bob’s situations should be parallel or symmetric to each other. That is, Bob observes Alice travel to the star and back, but from Alice’s frame of reference, it is Bob that travels away (in the opposite direction) and returns. Why aren’t their situations symmetrical?
ByAdmin7. Question 7 In the twin paradox example done in lecture, it seems that Alice’s and Bob’s situations should be parallel or symmetric to each other. That is, Bob observes…
On a spacetime diagram where we want to plot the world line for a light beam, why is it not useful to use units of meters for x and seconds for t?
ByAdmin2. Question 2 On a spacetime diagram where we want to plot the world line for a light beam, why is it not useful to use units of meters for…
True or false: The special theory of relativity applies only to inertial frames of reference.
ByAdmin11. Question 11 True or false: The special theory of relativity applies only to inertial frames of reference. 1 point  True False