Ozone layer is healing, scientists say

Ozone layer is healing thanks to 'growing evidence' the Montreal Protocol works

Ozone - NASA Science

The ozone layer blocks harmful UV rays from the sun.

SOLVED: (a) Ozone formation in the upper atmosphere starts when oxygen molecules absorb UV radiation with wavelengths less than or equal to 242 nm. Find the frequency and energy of the least energetic of these photons. (b) Ozone absorbs radiation with wavelengths in the range 2200-2900 A thus protecting organisms from this radiation. Find the frequency and energy of the most energetic of these photons.

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