Physics= Chapter 15 Review
how many frames of reference does the stay at home twin experience in the twin trip?
1
how many frames of reference does the traveling twin experience?
2
what does it mean to say that the speed of light is constant?
The speed of light has the same values in all frames of reference
what is spacetime?
Time and space as two parts of one whole
what is the first postulate of special relativity?
all laws of nature are the same in all forms of reference
The ratio of circumference to diameter for any size circle as pie. Similarly what is the ratio of space to time for lightwaves?
c, the speed of light
what is the second postulate of special relativity?
c, the speed of light, is always the same even if the source or rcvr moves
what does it mean to say that motion is relative?
in respect to a frame of reference
The path of light in a vertical light clock in a high-speed spaceship is seem to be longer when viewed from a stationary frame of reference. Why then does the light not appear to be moving faster?
it takes correspondingly more time
Does light travel through space? Through time? Through both space and time?
light travels through space, but not time
The speed of a ball you catch that is thrown from a moving truck depends on the speed and direction of the truck. Does the speed of light caught from a moving source similarly depend on the speed and direction of the source?
no the speed of light is the same for all cases
if we view a passing spaceship and see that the inhabitants time is running slow how do they see our time running?
slow also,each sees the same effect in the other
when a flashing light source approaches you does the speed of light, or the frequency of arrival of light flashes, or both, increase?
speed is the same, frequency is increased
what is time dilation?
stretching of time due to motion in space
can you travel while remaining in one place in space?
yes in time
is it possible for a person with a 70 year lifespan to travel farther than light travels in 70 years?
yes, you live longer if you are traveling at speeds closer to c