Quiz 2 Flashcards
Which two are the basic premises for the special theory of relativity?
- The laws of nature are the same for everyone
2. The speed of light is the same for everyone
In relativity, two people share the same frame of reference only if
They are big moving relative to each other
Bob is coming toward you at a speed of 75km/hr. You throw a baseball in his direction st 75km/hr. What does he see the ball doing?
He sees the ball coming at him at 150km/hr
If you see Jackie going to your left at exactly .99c and bob going to your right at exactly .99c, Jackie will say that bob is..?
Going away from her faster than 0.99c but slower than the speed of C
A spaceship is headed toward alpha Centauri at .999c. According to us, the distance to alpha Centauri is about 4 light years away. How far away is alpha Centauri according to the travelers in the ship
Quite a bit less than 4 light years
A spaceship is moving past us at a speed close to the speed of light. How would we view time (clocks) on the spaceship as it goes by
Their clocks are going slower than ours
If we could measure the mass of the spaceship as it goes by, what would it be
It’s mass is greater than its rest mass
How would the passengers on the spaceship view our clocks
Our clocks are going slow
How does the explosion of a nuke provide evidence of the theory of relativity
The bomb produces energy in accord with E=MC2, which is part of the theory of relativity
A man is moving by you at a speed close to the speed of light. Which of the following correctly summarized the effects you would notice on his mass, size, and time
His mass would be increased from its value at rest, his length would be decrease from its rest value but not in the direction in which he is moving, and his fine would be running slower than ours
Why do the predicted consequences of the special theory of relativity seem so strange to most of us
Because they are obviously only st speeds that we never experience in our daily live
The predictions of special relativity can sound implausible at first. What observational evidence do scientists have that the theory is correct
Subatomic particles in accelerators exhibit effects of time dilation and mass increase at high speeds.
Light is always observed to travel at the same speed
Time dilation can be observed in airplanes
Al is moving by you at a very high speed. Near light speed. You get out a clock and measure 10 seconds going by. If you also watch a clock in ALS ship, how much fine will you see it record during your 10 seconds?
Als clock will record less than 10 seconds
