A glass capillary tube is of the shape of a truncated cone with an apex angle α so that its two ends have cross-sections of different radii. When dipped in water vertically, water rises in its height h, where the radius of its cross-section in b. If the4 surface tension of water is S. its density is ρ, and its contact angle with glass is θ, the value of h will be (g is the acceleration due to gravity)
