If Newton were to draw a spacetime diagram in which the x' and t' axes represent a moving inertial frame, which
of the following diagrams would he draw?
(A) - - - -
(B) - - - -
(C) - - - -
(D)
If Newton were to draw a spacetime diagram in which the x' and t' axes represent a moving inertial frame, which
of the following diagrams would he draw?
(A) --- No. Nobody in their right mind would draw that.
If Newton were to draw a spacetime diagram in which the x' and t' axes represent a moving inertial frame, which
of the following diagrams would he draw?
(B) --- Yes. He would not change the space axis because everyone agrees on when t=0 is.
If Newton were to draw a spacetime diagram in which the x' and t' axes represent a moving inertial frame, which
of the following diagrams would he draw?
(C) --- No. Einstein would draw that.
If Newton were to draw a spacetime diagram in which the x' and t' axes represent a moving inertial frame, which
of the following diagrams would he draw?
(D) --- No. That is the way a space rotation would look.
A clock comparison is initiated by a spaceship, which sends out the message "This is freighter MS701. Please send GMT time-check.". According to the ship's clock, the message is sent at 5:00 P.M. At 6:00 P.M. by its clock, the ship receives the message "Read you MS701. Phobos station time is now 5:20 P.M. GMT". Freighter MS701 needs to reset its clock. Assuming that Phobos Station responded immediately (as it was programmed to do), the ship should change its clock reading from 6:00 P.M. to
(A) 5:20 P.M.
(B) 5:30 P.M.
(C) 6:10 P.M.
(D) 5:50 P.M.
A clock comparison is initiated by a spaceship, which sends out the message "This is freighter MS701. Please send GMT time-check.". According to the ship's clock, the message is sent at 5:00 P.M. At 6:00 P.M. by its clock, the ship receives the message "Read you MS701. Phobos station time is now 5:20 P.M. GMT". Freighter MS701 needs to reset its clock. Assuming that Phobos Station responded immediately (as it was programmed to do), the ship should change its clock reading from 6:00 P.M. to
(A) 5:20 P.M. --- No. It is not 5:20 P.M. any more
because the message was sent some time ago.
A clock comparison is initiated by a spaceship, which sends out the message "This is freighter MS701. Please send GMT time-check.". According to the ship's clock, the message is sent at 5:00 P.M. At 6:00 P.M. by its clock, the ship receives the message "Read you MS701. Phobos station time is now 5:20 P.M. GMT". Freighter MS701 needs to reset its clock. Assuming that Phobos Station responded immediately (as it was programmed to do), the ship should change its clock reading from 6:00 P.M. to
(B) 5:30 P.M. --- No.
That was ship-time when Phobos responded.
A clock comparison is initiated by a spaceship, which sends out the message "This is freighter MS701. Please send GMT time-check.". According to the ship's clock, the message is sent at 5:00 P.M. At 6:00 P.M. by its clock, the ship receives the message "Read you MS701. Phobos station time is now 5:20 P.M. GMT". Freighter MS701 needs to reset its clock. Assuming that Phobos Station responded immediately (as it was programmed to do), the ship should change its clock reading from 6:00 P.M. to
(C) 6:10 P.M. --- No. Ship-time for the Phobos response
was 5:30 P.M., so ship-time is 10 minutes fast.
A clock comparison is initiated by a spaceship, which sends out the message "This is freighter MS701. Please send GMT time-check.". According to the ship's clock, the message is sent at 5:00 P.M. At 6:00 P.M. by its clock, the ship receives the message "Read you MS701. Phobos station time is now 5:20 P.M. GMT". Freighter MS701 needs to reset its clock. Assuming that Phobos Station responded immediately (as it was programmed to do), the ship should change its clock reading from 6:00 P.M. to
(D) 5:50 P.M. --- Yes. The message took the same
time to travel each way,
so the Phobos response was at 5:30 P.M., ship-time. The correct time then was 5:20 P.M., so the ship's clock is 10 minutes fast and must be set back.
If Einstein were to draw a spacetime diagram in which the x' and t' axes represent a moving inertial frame, which
of the following diagrams would he draw?
(A) - - -
(B) - - -
(C) - - -
(D)
If Einstein were to draw a spacetime diagram in which the x' and t' axes represent a moving inertial frame, which
of the following diagrams would he draw?
(A) --- No. The time-axis is the world-line
of the moving origin --- It must tilt.
If Einstein were to draw a spacetime diagram in which the x' and t' axes represent a moving inertial frame, which
of the following diagrams would he draw?
(B) --- No. That is the diagram which
Newton would draw.
If Einstein were to draw a spacetime diagram in which the x' and t' axes represent a moving inertial frame, which
of the following diagrams would he draw?
(C) --- Yes. Einstein moved
the space axis toward the time axis.
If Einstein were to draw a spacetime diagram in which the x' and t' axes represent a moving inertial frame, which
of the following diagrams would he draw?
(D) --- No. That is what a rotation
in ordinary space would look like.
Observers on Earth find that an asteroid collides with the planet Mars at exactly the same time that a comet collides with the earth. A spaceship flying from Earth toward Mars will find that
(A) both happen at the same time.
(B) Mars get hit before the earth.
(C) Earth get hit before Mars.
Observers on Earth find that an asteroid collides with the planet Mars at exactly the same time that a comet collides with the earth. A spaceship flying from Earth toward Mars will find that
(A) both happen at the same time. --- No.
Moving observers do not agree about simultaneity.
Observers on Earth find that an asteroid collides with the planet Mars at exactly the same time that a comet collides with the earth. A spaceship flying from Earth toward Mars will find that
(B) Mars get hit before the earth.
Yes. Here is the spacetime diagram of the ship's reference frame.
Observers on Earth find that an asteroid collides with the planet Mars at exactly the same time that a comet collides with the earth. A spaceship flying from Earth toward Mars will find that
(C) Earth get hit before Mars.
No. Here is the spacetime diagram of the ship's reference frame.
Map of a Moving Reference Frame
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