Ultraviolet B

(i) Ultraviolet B has shorter wavelength than the visible light and is extremely harmful for humans.

(ii) UV-B penetrates deep into the skin and can cause mutations in the exposed cells.

(iii) It causes aging of skin cells and various types of skin cancers.

(iv) It can also cause inflammation in cornea called snow-blindness, cataract etc. Prolonged exposure is extremely harmful and can leave permanent damage to the cornea.