1.

The upper stratosphere consisting of the ozone layer protects us from the sun's radiation that falls in the wavelength region of : (1) 600 – 750 nm (2) 0.8 – 1.5 nm (3) 400 – 550 nm (4) 200 – 315 nm

Answer»

Correct option:  (4) 200 – 315 nm

Explanation:

The upper stratosphere consists of considerable amount of ozone (O3), which protects us from the harmful ultraviolet (UV) radiations (λ = 255 nm) coming from the sun. 



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