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An open capillary tube is lowered in ves...

An open capillary tube is lowered in vessel with mercury. The difference between the levels of the mecury in the vessel and in the capillary tube `/_\h=4.6 mm`. What is the radius of curvature of the mercury meniscus in the capillary tube? Surface tension of mercury is `0.46N//m`, density of mercury is `13.6gm//"cc"`.

A

`1/340 m `

B

`1/680m`

C

`1/1020 m`

D

information is insufficient

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The correct Answer is:
B
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