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Physics Ch 15

Special Relativity - Space and Time

QuestionAnswer
what is space-time? a combo of space and time, which are viewed in special relativity as two parts of one whole
can you travel while remaining in one place in space? when you stand still, you only travel though time
does light travel through speace? through time? through both time and space? only through space
waht is time dilation? a streatching of time that occurs ever so slightly for everyday speeds, but significally for speeds approaching the speed of light
what does it mean to say that motion is relative? it depends on the place (the frame of refrence)
does the speed of light caught from a moving source depends on the speed and direction of the source? no, the speed of light is constant
what does it mean to say that the speed of light is constant? it travels at the same speed in all refrences frame
what is the first postulate of special relativity? all the laws of nature are the same in all uniformly moving frames of refereces
what is the second postulate of special rel? the speed of lgiht in empty space will always have the same value regardless of the motion of the source or the motion of the observers
the ratio is velocity gain to time for a freely falling body is g. similaraly, what is the ratio of distance to time for light waves? C = space / time
the pah of light in vertical "light clock" in a high speed spaceship is seen to be longer when viewed from a stationmary frame of reference. why, then, does the light not appear to be moving faster? because the speed of lgiht is constant
if we view a passing spaceship and see that the inhabitants time is running slow, how do they see our time running? they see our time running slow
when a flashing light source approaches you, does the speed of light, or the frequency of arrival of light flashes, or both, increase? frequency of arrival of light flashes increase
how many FOR does the stay at home twin experience in the twin trip? one
how many FOR does the traveling twin experisnce? two
is it possible for a person with a 70-year lifespan to travel farther than light travels in 70 years? yes, bc they are travling close to the speed of light
Created by: meglea90
 

 



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