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CBSE Class 10 Answered

If somebody travels with the speed of light can it travel time?  
Asked by adityasharma.ardra | 28 Mar, 2020, 10:55: AM
answered-by-expert Expert Answer
There are two reference frame. Let is consider, one reference frame is attached to earth which is stationary.
 
Other reference frame is attached to moving object.
 
If an observer is in reference frame attached to moving object, he will not feel the movement and effect of speed of object.
 
For an observer in reference frame which is at rest,  time duration  Δt' of events taking place in the moving reference frame is
 
factored by begin mathsize 14px style gamma space equals space fraction numerator 1 over denominator square root of 1 space minus space begin display style v squared over c squared end style end root end fraction end style   , where v is speed of moving reference frame and c is speed of light.
when v ≈ c , the factor γ >> 1
 
For example , life time of radioactive nuclei when it is moving with velocity comparable to c appears longer
in comparision with life time of radioactive nuclei which is at rest .
Answered by Thiyagarajan K | 28 Mar, 2020, 03:01: PM

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