Question

Only short wavelength UV rays are ionising because

• A. They have higher energy than long wavelength UV rays
• B. They have lesser energy than long wavelength UV rays
• C. Only short wavelength UV rays reach the earth's atmosphere
• D. None of the above

Answer 1

The correct option is A They have higher energy than long wavelength UV rays

UV radiation is part of the electromagnetic spectrum that reaches the earth from the sun. The shorter wavelength UV rays have higher energy than longer wavelength rays and fall in the category of ionising radiations along with X-rays and gamma rays.