X-rays were
discovered over a hundred years ago and have since been used in laboratories, hospitals, airports, etc.
It seems, however, that soon, replaced by T rays, they will be eliminated. T rays are called because their frequency is thermal (1.012 Hz).
In the spectrum of electromagnetic waves is located between microwave and infrared rays. They are less energetic than x-rays and therefore less harmful. Therefore, at the Rensselaer Polytechnic Institute in Troy, New York, scientist XicdZhang has prepared the T-ray apparatus with his team.
It takes pictures of the human skeleton, but it also serves to analyze the composition of gases or the amount of mold in food.