What are the uses of X-ray, ultraviolet ray and infrared ray?

Is the ratio of frequencies of ultraviolet rays and infrared rays in glass more than, less than or equal to 1?

Write four uses of ultraviolet rays.

The ratio of frequencies of ultraviolt rays and infrared rays is

Write source of ultraviolet rays and uses.

Electromagnetic waves used as a diagnostic tool in medicine are (A) X-rays (B) ultraviolet rays (C) infrared radiation (D) ultrasonic waves