Why is compass needle kept in a closed glass vessel?
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it is kept in it because if it would be placed outside it would have dust which would have disturbed the rotation of compass needle,that is why it is kept inside a glass vessel so that it can rotate freely....i hope my answer will help you..
harshshukla5810:
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hi friend
the lens doesn't have to be glass, a lens grade plastic can be used. It is sealed to keep dirt and contaminats out of the housing to reduce wear between the needle and the pivot in an air filled compass
the lens doesn't have to be glass, a lens grade plastic can be used. It is sealed to keep dirt and contaminats out of the housing to reduce wear between the needle and the pivot in an air filled compass
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