Your eyes cannot see THz radiation, so no. It's invisible to the human eye. Like microwaves. But yes, it is possible to produce a beam. Also: to be fair, th

Your eyes cannot see THz radiation, so no. It's invisible to the human eye. Like microwaves. But yes, it is possible to produce a beam. Also: to be fair, the challenge in finding efficient sources is really only one of the challenges. Not even the biggest one.