Question

In a laser tag match, you charge your stationary opponent at speed v , fire, and hit your target. What speed would she measure for your laser pulse? What speed would you measure for your laser pulse?

Answer 1

According to Special Relativity, the speed of light is constant for all observers regardless of their relative motion. In our case, two people moving towards each other with some speed and tagging with the laser pulse. The laser pulse in your reference frame has a speed 'c' (the speed of light) and according to this theory, this speed is constant for every observer no matter if they are in relative motion with respect to you.

The theory suggests even in a hypothetical situation when you are moving with the speed of light and throw such pulses. you will observe it to have a speed of 'c' and a stationary observer would also observe its velocity to be 'c'.

So, the final answer is

Both of the observers measure the pulse speed to be the same and equal to 'c'. The value of 'c' is 299 792 458 m/s.