suppose you are told that the linear size of everything in the universe has been doubled overnight .can u test this statement by m
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measuring sizes with a meter stick ??can you test it by using fact that the speed of light is a universal constant and has not changed?what will happen if all the clocks in the universe also start running at half the speed?
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Answer:
Answer
As the speed of light is a universal constant, the light will take double the time to cross a given object. This will give us the idea that the size has doubled.
When on one fine day we find out that the linear size of all the objects in our universe has doubled, then we can thoroughly check it by using speed of light as parameter.
The above scenario is true only when the time rate remains the same as it was before.
Now, if we have a scenario when the clocks have slowed down by half, then 1 second in new time frame will be half that in old time frame.
This will imply that light will have only half a second technically to travel the same amount of distance.
Hence, logically light will travel double the distance considering the new time frame.
This will lead us to believe that the universe has not changed its size at all keeping speed of light as parameter.