Bannanafish
Member
- Joined
- Sep 25, 2003
- Messages
- 153
- Gender
- Male
- HSC
- 2003
EXPLANATION #1
Acceleration of the spaceship, taking time for the astronaut to "see" the clock on earth, and any other "complications" are all irrelivant. This is a THOUGHT experiment, hence ignoring all these factors. Hell, if it weren't i'd argue how the hell could the astronaut see a clock so far away?? Also in Einstein's THOUGHT experiment, he never said anytihng about acceleration (which is obviously needed for his trains to travel so fast).
So since we can ignore all these things, think of the spaceship as a train.
Train is travelling at 0.8c
Goes past an observer
Observer looks in the window of the train and the clock inside is running slow (i.e. for every second on his watch, the clock is only going a fraction of a second)
The passenger on the train looks at the observer's watch and sees it as going slow (i.e. for every second on his clock, the watch is only going a fraction of a second)
If the observer sees something to take 10 seconds according to his watch, then he sees the clock inside the train go 6 second.
If the passenger sees something to take 10 seconds according to his clock, then he sees the watch on the observer to go 6 seconds.
Now if 10 seconds was 10 years, the PASSENGER'S clock READS 10 hours. THIS IS WHAT THE QUESTION GAVE YOU.
Now the PASSENGER looks at the OBSERVERS watch. THIS IS THE PERSPECTIVE THE QUESTION ASKED.
Therefore the OBSERVERS watch would say 6 years have passed.
-------------------
EXPLANATION #2
the question now becomes, train though experiment or twins paradox
if for trains:
spaceship measures 10 years (given)
spaceship views earth as 6 years
earth measures 10 years
earth views spaceship as 6 years
since both perspectives are as valid as the other, earth is 6 years with the perspective of the spaceship (that's the perspective the question asked)
therefore B is correct
for twins paradox:
spaceship measures 10 years (given)
spaceship views earth as 6 years
earth measures 10 years
earth views spaceship as 6 years
since in twins paradox, spaceship comes back, earths perspective is taken preference, therefore the people on earth are older than the people in the spaceshit, BUT it's 10years older for earth people, 6 years older for space people
therefoe C is correct
------------------
Therefoe D is definately wrong, even arguing from your perspective, you are saying C is correct
Acceleration of the spaceship, taking time for the astronaut to "see" the clock on earth, and any other "complications" are all irrelivant. This is a THOUGHT experiment, hence ignoring all these factors. Hell, if it weren't i'd argue how the hell could the astronaut see a clock so far away?? Also in Einstein's THOUGHT experiment, he never said anytihng about acceleration (which is obviously needed for his trains to travel so fast).
So since we can ignore all these things, think of the spaceship as a train.
Train is travelling at 0.8c
Goes past an observer
Observer looks in the window of the train and the clock inside is running slow (i.e. for every second on his watch, the clock is only going a fraction of a second)
The passenger on the train looks at the observer's watch and sees it as going slow (i.e. for every second on his clock, the watch is only going a fraction of a second)
If the observer sees something to take 10 seconds according to his watch, then he sees the clock inside the train go 6 second.
If the passenger sees something to take 10 seconds according to his clock, then he sees the watch on the observer to go 6 seconds.
Now if 10 seconds was 10 years, the PASSENGER'S clock READS 10 hours. THIS IS WHAT THE QUESTION GAVE YOU.
Now the PASSENGER looks at the OBSERVERS watch. THIS IS THE PERSPECTIVE THE QUESTION ASKED.
Therefore the OBSERVERS watch would say 6 years have passed.
-------------------
EXPLANATION #2
the question now becomes, train though experiment or twins paradox
if for trains:
spaceship measures 10 years (given)
spaceship views earth as 6 years
earth measures 10 years
earth views spaceship as 6 years
since both perspectives are as valid as the other, earth is 6 years with the perspective of the spaceship (that's the perspective the question asked)
therefore B is correct
for twins paradox:
spaceship measures 10 years (given)
spaceship views earth as 6 years
earth measures 10 years
earth views spaceship as 6 years
since in twins paradox, spaceship comes back, earths perspective is taken preference, therefore the people on earth are older than the people in the spaceshit, BUT it's 10years older for earth people, 6 years older for space people
therefoe C is correct
------------------
Therefoe D is definately wrong, even arguing from your perspective, you are saying C is correct
comparitively physics is so interesting
