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Which of the world lines below represents everything that happens (at all locations) in a certain frame of reference at a given time t? (The arrows on the red world lines indicate that the world line extends to infinity in the specified direction.)
ByAdmin7. Question 7 Which of the world lines below represents everything that happens (at all locations) in a certain frame of reference at a given time t? (The arrows on…
Consider a situation that is similar to that in one of the video lectures, i.e., Alice observing Bob traveling from Earth to a star at a certain distance from Earth. Assume that the Lorentz factor for the relative velocity between Alice’s frame of reference (the Earth-star frame of reference) and Bob’s frame of reference (the spaceship frame of reference) has a value of 2. Alice, using her system of clocks, measures the elapsed time it takes Bob to reach the star as 8 years. She also takes a photo of Bob’s clock as he passes the star. According to the photo, how much time has elapsed on Bob’s clock from when he passed by Earth?
ByAdmin2. Question 2 Consider a situation that is similar to that in one of the video lectures, i.e., Alice observing Bob traveling from Earth to a star at a certain…
Imagine that you had a spaceship that could travel at the speed of light. If you got in your spaceship and took a well-running clock (any clock that keeps time well) with you, and then passed by the Earth going at the speed of light, what would you observe about your clock?
ByAdmin9. Question 9 Imagine that you had a spaceship that could travel at the speed of light. If you got in your spaceship and took a well-running clock (any clock…
Consider Alice’s spaceship with the paintball apparatus that shoots two paintballs toward clocks at opposite ends of her ship, each with speed S relative to the apparatus (similar to the video lecture). Assume that Alice has properly synchronized her clocks, that her spaceship is moving with speed V to the right (in the positive x direction) relative to Bob, that S is greater than V, and that S and V are much less than the speed of light. True or false: In Alice’s frame of reference, the two paintballs will hit the clocks simultaneously (i.e., each clock will read the same time when the paintballs hit).
ByAdmin1. Question 1 Consider Alice’s spaceship with the paintball apparatus that shoots two paintballs toward clocks at opposite ends of her ship, each with speed S relative to the apparatus…
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 near the speed of light. True or false: The time dilation effect means that Alice observes time slowing down on her clock.
ByAdmin10. Question 10 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…
In the Lorentz transformation equation for time, what is a consequence of the xmoving term?
ByAdmin5. Question 5 In the Lorentz transformation equation for time, what is a consequence of the xmoving term? 1 point  Time dilation Leading clocks lag Length contraction