Question

how do we take measurements from a convex meniscus liquid ? ​

Answer 1

If the meniscus is convex, take your measurement at the highest point of the curve. The short answer: Take your measurement from the center of the meniscus. It's that easy. Make sure to hold your container at eye level and read at the level of the center of the meniscus.

Answer 2

Answer:

Measure so that the line you are reading is even with the center of the meniscus. For water and most liquids, this is the bottom of the meniscus. For mercury, take the measurement from the top of the meniscus. In either case, you are measuring based on the center of the meniscus.