Question

Which of the following is absorbed by the ozone layer?

• A. $\mathrm{\gamma }-$rays
• B. Visible light
• C. Radio waves
• D. Ultraviolet rays

Answer 1

The correct option is D

Ultraviolet rays

1. The molecule ozone is made up of three oxygen atoms ${\mathrm{O}}_3$. When UV light with a wavelength between $240$ and $320$ nanometers meets an ozone molecule, it absorbs the energy and converts it into ozone ${\mathrm{O}}_3$ alterations to ${\mathrm{O}}_2$and $\mathrm{O}$.
2. The $\mathrm{O}$ atom quickly joins with another ${\mathrm{O}}_2$ forming a molecule ${\mathrm{O}}_3$ and is able to absorb UV rays.

Thus, the correct answer is an option (D).