Pascal’s law : A change in the pressure applied to an enclosed fluid at rest is transmitted undiminished to every point of the fluid and to the walls of the container, provided the effect of gravity can be ignored.
[Note : The law does not say that ‘the pressure is the same at all points of a fluid’ – rightly so, since the pressure in a fluid near Earth varies with height. Rather, the law applies to the change in pressure. According to Pascal’s law, if the pressure on an enclosed static fluid is changed by a certain amount, the pressure at all points within the fluid changes by the same amount.The above law is due to Blaise Pascal (1623 – 62), French mathematician and physicist.]
