Final answer:
In the medical field, lasers are used for very precise surgical procedures, including as a scalpel, to kill cancer cells, and to vaporize artery plaque, all of which are medical uses of a laser.
Step-by-step explanation:
Lasers have a variety of uses in the medical field, including as a scalpel to make precise cuts, to kill cancer cells, and to vaporize plaque in an artery. In dentistry, lasers are commonly used to remove ulcers, stop bleeding, and reshape gum tissue. The precision of laser surgery, due to its single wavelength output being very precisely focused, allows for advantages such as minimal bleeding and high accuracy in procedures like retinal welding to repair tears in the retina using a green argon laser.
Laser beams in medicine are advantageous because they are directional, intense, and narrow, which benefits applications like laser eye surgery to improve vision without corrective lenses and changing the shape of the eye's lens.