What is the relationship between ozone and UV radiation according to the material?

What is the relationship between ozone and UV radiation according to the material?

• A. Stratospheric ozone blocks UV-B radiation
• B. Tropospheric ozone blocks UV-B radiation
• C. Ozone has no effect on UV radiation
• D. UV radiation increases ozone production in the stratosphere

Answer: (C)

Ozone acts as a protective shield against the sun’s ultraviolet light. In the stratosphere, the ozone layer absorbs most of the ultraviolet radiation, especially the more harmful UV-B and UV-C wavelengths, so only a reduced amount reaches the surface. The presence of ozone is itself driven by UV light, which splits oxygen molecules to form ozone, and then ozone absorbs UV and can be transformed back, creating a cycle. Tropospheric ozone is a pollutant at ground level and does not provide the same shielding effect. So, ozone does affect UV radiation by blocking a significant portion of it, rather than having no effect.

Ozone acts as a protective shield against the sun’s ultraviolet light. In the stratosphere, the ozone layer absorbs most of the ultraviolet radiation, especially the more harmful UV-B and UV-C wavelengths, so only a reduced amount reaches the surface. The presence of ozone is itself driven by UV light, which splits oxygen molecules to form ozone, and then ozone absorbs UV and can be transformed back, creating a cycle. Tropospheric ozone is a pollutant at ground level and does not provide the same shielding effect. So, ozone does affect UV radiation by blocking a significant portion of it, rather than having no effect.