He could feel the swell of his heart against his chest and a light pulse in the flesh of his neck.

Each light pulse reaches the opposite walls of the carriage at the same time.

It works by simultaneously measuring both the light pulse and heat pulse generated by a particle interaction within its internal scintillator crystal.

Here the adjustable width, delay and low jitter of a light pulse generator offers an alternative to a do-it-yourself project.

The net effect causes the light pulse to spread over distance, introducing intersymbol interference.