Question

Question :

A/ How is it possible that the speed of light in vacuum is a constant regardless of the motion of the source or the observer?

B/ The time dilation equation is Δt = γΔt_p; where γ = 1/(1 – v²/c²)^1/2. Explain why time dilation effects are not readily noticeable at speeds encountered in daily life here on Earth?

C/ What happens to the time dilation equation if v = c? What does the result mean?

D/ What happens to the time dilation equation if v > c? What does the result mean?

Answer 1

A) We assume that nothing is faster than light (no particle moves faster than light) if you measure the speed of light in vacuum with motion of source is equal to the one who measures which are in rest.This the second postulate of relativity.

B) speeds encountered in daily life are much smaller than speed of light so the term v^2/c^2 is almost zero (negligible) so it ∆t=∆tp

C) if v=c time dilation will goes to infinity means you can't calculate time elasped between two events .since the events will occur at same time relative to each other .

D) if v>>c then time dilation will get into complex thing,in which time is short behind the obsever ,means your in future .