Who developed the mercury barometer, an instrument that permits the accurate measurement of atmospheric pressure

Correct option is D

Explanation The mercury barometer, which accurately measures atmospheric pressure, was invented by Evangelista Torricelli in 1643. He was an Italian physicist and mathematician, and his invention demonstrated that air has weight and that atmospheric pressure varies.
Key Points: 1. Principle of Mercury Barometer:
· A column of mercury in a tube is balanced against the atmospheric pressure.
· The height of the mercury column changes with variations in atmospheric pressure.
2. Significance of Torricelli's Discovery:
· Provided the first accurate method to measure atmospheric pressure.
· Established the unit of pressure "Torr", named in his honor.
Explanation of Other Options: · (a) Pascal: Blaise Pascal contributed to the study of pressure but did not invent the mercury barometer. He demonstrated that atmospheric pressure decreases with altitude.
· (b) Barode: This is not a recognized historical figure or contributor to barometric science.
· (c) E. Lavoisier: Antoine Lavoisier, known as the father of modern chemistry, made significant contributions to chemical science but not to the invention of the mercury barometer.
Correct Answer: (d) Torricelli Information Booster 1. Applications of Mercury Barometer:
· Used to forecast weather changes by measuring atmospheric pressure.
· Fundamental in studying altitude and pressure relationships.
2. Torricelli's Experiment:
· He used a glass tube filled with mercury and inverted it into a dish.
· The height of the mercury column was observed to reflect atmospheric pressure.
3. Legacy of Evangelista Torricelli:
· He laid the groundwork for modern meteorology and fluid dynamics.