Answer:
Since infrared waves are of lesser energy so it do not have sufficient energy to break the cancer cells
Step-by-step explanation:
As we know that if we arrange the electromagnetic waves in decreasing order of energy then it is as following
1) Gamma rays
2) X rays
3) Ultraviolet rays
4) Visible light
5) Infrared waves
6) Microwaves
7) Radio waves
so here since energy of infrared waves as even smaller then visible light so it is not used for the treatment of cancer cells