Question

Ozone in the stratosphere captures \(\underline{\hspace{1cm}}\) and protects us from harmful effects.

• A. UV A, UV B and UV C radiations completely
• B. UV A and UV B radiations completely
• C. UV B partially and UV C radiations completely
• D. UV A completely and UV B and UV C radiations partially

Hint:

Remember the ozone layer's effectiveness: - UV-C: Completely blocked. - UV-B: Mostly Blocked (partially absorbed). - UV-A: Allows through (mostly unabsorbed).

Answer 1

The Correct Option is C

Step 1: UV Radiation Types.
Solar ultraviolet (UV) radiation is categorized by wavelength: UV-A (longest), UV-B (medium), and UV-C (shortest, most energetic).

Step 2: Ozone Layer Interaction. 
- UV-C: Highly harmful, UV-C is almost entirely absorbed by the ozone layer, preventing it from reaching the Earth's surface. Complete absorption. 

- UV-B: Also harmful, UV-B is largely absorbed by the ozone layer (approximately 95%), with some reaching the surface. Partial absorption. 

- UV-A: Least energetic, UV-A is minimally absorbed by the ozone layer, with most reaching the surface. 

Conclusion: The ozone layer completely absorbs UV-C and partially absorbs UV-B.