3 ms·Coherent radiation in all directions usually isn't something that one imagines when hearing 'LASER'.by hoseja 7y agoCoherent radiation in all directions usually isn't something that one imagines when hearing 'LASER'.ggm 7y agoPut it in a giant tank of water with one exit hole. Highly inefficient...Sharlin 7y agoIt is not, but technically directionality is not required, only amplification by stimulated emission.