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Physics Relativity
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Gravity
Key Concepts:
Terms in this set (22)
The experiments of Michelson and Morley provided evidence that the speed of light is
invariant
the same whether its source approaches or recedes
constant
all of these
none of these
all of these
The ether theory of light propagation is
much used
incomplete, but still useful
unexplained
discredited
discredited
According to the special theory of relativity, all laws of nature are the same in reference frames that
accelerate
move in circles
move at constant velocity
oscillate
none of these
move at constant velocity
According to the special theory of relativity, events that are simultaneous in one frame of reference
are simultaneous in all frames of reference
are not simultaneous in other frames of reference
may or may not be simultaneous in other frames of reference
may or may not be simultaneous in other frames of reference
Two lightning bolts are seen to strike two distant locations at the same time. Seen from a different location, the two lightning bolts
will also be seen at the same time
will not be seen at the same time
may or may not be seen at the same time
may or may not be seen at the same time
You and a friend share the same spacetime when there is no
relative velocity between you
acceleration for either of you
difference in your rate of heartbeats
relative velocity between you
The stretching out of time due to motion is called time
stretching
dilation
contraction
warp
expansion
dilation
Compared to clocks in a stationary reference frame, clocks in a moving reference frame run
slower
faster
at the same speed
slower
Clocks on a spaceship moving very fast relative to the Earth run more slowly when viewed from
the spaceship
the Earth
both places
neither place
the Earth
According to the special relativity, one can travel at increased rates
both forward and backward in time
backward in time
only forward in time
only forward in time
According to Einstein's theory of special relativity
space and time are aspects of each other
energy and mass are aspects of each other
both of these
none of these
both of these
When an object is pushed to relativistic speeds, its momentum is
greater than mv
smaller than mv
equal to mv
greater than mv
Suppose you look at the huge clock on the Big Ben Tower in London and it reads 12 noon. If you could travel away from the clock at the speed of light and view it with a telescope, it would
run slower that usual
run faster that usual
be frozen at 12 noon
be frozen at 12 noon
A spaceship that is traveling very fast with respect to your frame of reference, fires a photon beam that travels at speed c with respect to the spaceship. You measure the photon beam's speed to be
less than c
equal to c
more than c
equal to c
Event A occurs before event B in a certain frame of reference. In another frame of reference, event A could occur
after event B
simultaneous with event B
either of these
neither of these
either of these
According to the special theory of relativity, if you measure your own pulse while traveling at very high speeds, you would notice your pulse rate to
increase
decrease
be the same as usual
be the same as usual
We are actually looking into the past when we look at
a distant star.
our physics book.
actually both of these
none of these
actually both of these
The frequency of a blinking light source appears to double as the light source approaches you. As the same light source moves away from you at the same speed, its frequency
is halved.
is doubled.
stays the same.
is halved
In some reference frame in the universe, you, right now, may be traveling at a speed that is
faster than the speed of light.
nearly the speed of light.
at the speed of light.
not enough information given
nearly the speed of light
Suppose you and your sister travel in space in such a way that you notice a slowing of time for your sister. Your sister will notice that your time runs
faster than hers.
slower than hers.
the same as hers.
not enough information given
slower than hers.
Compared to standard Earth time, there is a physical slowing of your time when you travel at
relativistic speeds.
everyday low speeds.
both of these
none of these
everyday low speeds.
According to relativity theory, if a space trip finds a son or daughter biologically older than his or her parents, then the space trip is taken by the
son or daughter.
parents.
either
Neither, it can't be done.
parents.
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