Ultraviolet, X-ray and Gamma Ray

Ultraviolet rays are a type of electromagnetic wave with a wavelength shorter than visible light but longer than X-rays. They are harmful in high doses but are also used for sterilisation and in tanning lamps.
Exposure to large amounts of Ultraviolet (UV) rays can cause skin damage, eye problems, and increase the risk of skin cancer.
X-rays are electromagnetic waves with wavelengths shorter than UV rays. They can penetrate through many materials, which makes them useful for medical imaging and security screening.
X-rays can be harmful with prolonged exposure, leading to burns and an increased risk of cancer.
Gamma rays are the shortest wavelength electromagnetic waves and are produced by nuclear reactions. They can penetrate even more deeply than X-rays, and are used in cancer treatment.
Gamma rays can be extremely harmful to living tissue. They are used in cancer treatments in controlled doses to kill cancer cells, but they also kill healthy cells and must be carefully aimed to minimise damage.
Both X-rays and Gamma rays are types of ionising radiation because they have enough energy to remove tightly bound electrons from the orbits of atoms, which can damage these atoms and result in illness or death.