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Question : Ultra violet radiations of the Sun do not reach the earth because, earth's atmosphere is surrounded by:

Option 1: Carbon dioxide

Option 2: Ammonia

Option 3: Chlorine

Option 4: Ozone


Team Careers360 17th Jan, 2024
Answer (1)
Team Careers360 24th Jan, 2024

Correct Answer: Ozone


Solution : The correct answer is ozone.

Ozone layer present in stratosphere protects the earth from the harmful ultraviolet radiations of the sun. It majorly absorbs the UV b and UV c radiations which is the most severe. Although it is transparent to UV A radiations. Its thickness is measured in Dobson Units. Ozone present in stratosphere is good ozone, while the ozone present in the troposphere is a pollutant. Chlorine, chlorofluorocarbons etc. are ozone depleting substance.

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