Ovserver S detects two flashes of light. A big flash occurs at `x_(1)=1200m and, 5.00mus` later, a small flash occurs at `x_(2)=700m`. As detected by observer S', the two flashes occur at a single coordinate x'. (a) What is the speed parameter of S', and (b) is S' moving in the positive or negative direction of the x axis? To S', (c ) which flash occurs first and (d) what is the time interval between the flashes?

Answer

(a) 0.334; (b) negative; (c ) big flash; (d) 4.71 `mus`