Pascal's law states that pressure at a point is equal in all directions, in a

Concept:

According to Blaise Pascal, a French scientist observed that the pressure in a fluid at rest is the same at all points if they are at the same height and it is termed Pascal’s Law.

i.e., the pressure exerted by the fluid on an object at a certain height will be the same in all direction and hence it can be expressed as

\({P_a} = {P_b} = {P_c} \Rightarrow \frac{{{F_a}}}{{{A_a}}} = \frac{{{F_b}}}{{{A_b}}} = \frac{{{F_c}}}{{{A_c}}}\)

From the above fig. we can see that the force against area within a fluid at rest will always experience pressure perpendicular to their surface area, and the object will experience equal pressure throughout the surface.

And there are a number of devices, such as hydraulic lift and hydraulic brakes, are based on Pascal’s law, these devices used fluids for transmitting pressure.