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Question

In 1653, which French scientist observed that if some pressure is applied to any point of an incompressible fluid, the same pressure is transmitted to all points of the fluid and to the walls of the vessel?

This question was previously asked in
SSC CGL 2022 Tier-II (Paper 2 JSO) Previous Year Paper (04-Mar-2023)
The correct answer is

Blaise Pascal

The correct answer is Option 3: Blaise Pascal.

Explanation of Pascal's Principle

This fundamental principle in fluid mechanics is known as Pascal's Law (or Pascal's Principle), formulated by the French mathematician, physicist, and philosopher Blaise Pascal in 1653.

The law states that a change in pressure applied to an enclosed, incompressible fluid is transmitted undiminished to every portion of the fluid and to the walls of its container.

$$P = \frac{F_1}{A_1} = \frac{F_2}{A_2}$$

This behavior is the foundational scientific principle behind modern hydraulic systems, including hydraulic jacks, car brakes, and heavy machinery lifts, where a small force applied over a small area generates a much larger force over a larger area.

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