Question
The Wavelengths that are most important in the context of stratospheric ozone depletion are :
The correct answer is
280 - 320 nm
Ozone Depletion Wavelength Importance
Stratospheric ozone depletion is primarily influenced by chemical reactions involving ozone (O<0xE2><0x82><0x83>) and certain atmospheric pollutants. These reactions are often initiated or accelerated by specific wavelengths of ultraviolet (UV) radiation from the sun.
Critical Wavelength Range
- Ozone molecules absorb UV radiation, which can lead to their destruction.
- The most significant wavelengths responsible for breaking down ozone molecules and activating the chemical cycles (involving substances like CFCs) that deplete the ozone layer fall within the UV-B spectrum.
- The wavelength range of 280 to 320 nanometers (nm) corresponds to this critical UV-B radiation.
- Radiation outside this range (like visible light or longer UV wavelengths) does not possess sufficient energy to drive these specific depletion reactions effectively in the stratosphere.
Therefore, the wavelengths most important in the context of stratospheric ozone depletion are in the 280 - 320 nm range.
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Important Questions from Ozone Layer Depletion
- Which of the following is a catalytically inactive (or reservoir) molecule containing chlorine in stratosphere?
- Choose the correct statement(s)
A. O$_3$ in stratosphere is not completely effective in shielding us from UV-B
B. UV-A is biologically least harmful.
C. Chapman mechanism deals with only O$_3$ formation in stratosphere.
D. Sunscreen lotions either reflect or absorb or scatter UV-B and UV-A
E. UV-B helps in dissociation of O$_3$ molecule in stratosphere.
Choose the correct answer from the options given below. Ozone layer depletion is a major phenomenon in :
- With regard to ozone depletion over Antarctica, select the false statement :
- Atmospheric life times of CFCs is typically in the range :
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