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Question

______is the unit of measurement of thickness of ozone.

A
Dobson unit
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B
Bar
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C
Pascal
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D
Both a and c
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Solution

The correct option is A Dobson unit
Ozone or O3 is a molecule made up of three oxygen atoms.

The high concentration of ozone that is found in the stratosphere around 15 – 30 km above the Earth's surface is called the ozone layer.

The harmful ultraviolet radiation from the sun is absorbed by the ozone layer and thus it acts as a shield.

A Dobson unit (DU) is the unit of measurement of ozone in a column of air from the ground to the top of the atmosphere.

Bar and Pascal are units to measure pressure.

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