Question

Which one of waves tans our skin and causes some substances to become fluorescent?

• A. infrared waves.
• B. ultraviolet waves.
• C. gamma rays.
• D. infrared and ultraviolet waves both.

Answer 1

The correct option is B ultraviolet waves.

Ultraviolet rays (or waves) tan our skin and cause some substances to become fluoroseun sun is important source of ultraviolet light. Sun rays reach our skin and burns the upper layer of skin, causing sunburns prolonged doses of UV radiation can induce skin cancer in human beings.

Ozone layer is protecting us from UV rays but the problem is that Ozone layer is also depleting because of excessive use of CFC's.