Stratospheric Ozone UV Absorption Wavelength
The stratospheric ozone layer plays a vital role in protecting life on Earth by absorbing harmful ultraviolet (UV) radiation from the sun.
Ozone Absorption Spectrum
Ozone (O3) effectively absorbs UV radiation across several wavelength ranges. However, it absorbs most strongly in the UV-C and UV-B regions.
- UV-C: Wavelengths less than 280 nm (effectively all absorbed).
- UV-B: Wavelengths from 280 nm to 315 nm (most of this is absorbed).
- UV-A: Wavelengths from 315 nm to 400 nm (largely transmitted).
Principal Absorption Range
Considering the strong absorption across both UV-C and the majority of UV-B wavelengths, the principal absorption range for stratospheric ozone is best represented as 230 – 320 nm.
This range includes:
- The entirety of the most damaging UV-C radiation.
- The biologically significant and harmful portion of the UV-B radiation.
Conclusion
Therefore, stratospheric ozone absorbs UV radiations principally in the wavelength range of 230 – 320 nm.
Important Questions from Global Environmental Issues
pH of dust free and unpolluted rainwater is 5.6 due to dissolution of
The major component of volcanic gas emissions is
Given below are two statements, one labelled as Assertion (A) and the other labelled as Reason (R). Read the statements and choose the correct answer using the code given below.
Assertion (A) : CFCs are able to penetrate the stratosphere.
Reason (R) : CFCs are highly unreactive.
Given below are two statements, one labelled as Assertion (A) and the other labelled as Reason (R). Read the statements and choose the correct answer using the code given below.
Assertion (A) : In general a rise in temperature of water adversely affects the aquatic life.
Reason (R) : An increase in temperature causes hyperoxia among aquatic species.
Which of the following is not a precursor of classical smog?
