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: Identify the types of UV radiation. 
Ultraviolet radiation from the sun is classified into three types based on wavelength: UV-A (longest wavelength), UV-B (medium), and UV-C (shortest wavelength, most energetic).

Step 2: Describe the interaction of each type with the ozone layer. 
- UV-C: This is the most harmful type of UV radiation. The stratospheric ozone layer is extremely effective at absorbing it, so virtually none reaches the Earth's surface. It is absorbed completely. 

- UV-B: This radiation is also very harmful. The ozone layer absorbs a significant portion (around 95%) of it, but some still gets through. It is absorbed partially. 

- UV-A: This is the least energetic type of UV radiation. The ozone layer absorbs very little of it, and most of it reaches the surface. 

Conclusion: The most accurate description is that the ozone layer absorbs UV-C completely and UV-B partially.