Question

Explain why the liquid rises up the tube

Answer 1

Due to surface tension, the liquid level rises up inside the capillary. The phenomenon is known as capillary action or capillarity. Using a travelling microscope, the microscope is focused on the lower meniscus of the curved concave surface.

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Answer 2

Explanation:

When a capillary tube is dipped in water, the water meniscus inside the tube is concave. The pressure just below the meniscus is less than the pressure.