Student Education Repository (மாணவர்கள் கல்விக் களஞ்சியம்): Today (December 28, 1663) is the Memorial Day of the Italian mathematician and physicist Francesco Maria Grimaldi, who also discovered the Diffraction effect.

Monday, December 28, 2020

Today (December 28, 1663) is the Memorial Day of the Italian mathematician and physicist Francesco Maria Grimaldi, who also discovered the Diffraction effect.

Today (December 28, 1663) is the Memorial Day of the Italian mathematician and physicist Francesco Maria Grimaldi, who also discovered the Diffraction effect.

Francesco Maria Grimaldi was born on April 2, 1618, in Bologna, Italy. His father, Parit Grimaldi, was a classic merchant who emigrated to Bologna in 1589. Francesco was the fourth of six sons of his parents, five of whom survived. He had two older brothers. When Francesco was young, his father died. At the time, his mother was running a family chemistry shop. In 1571 Jesuit lived in a house set up to train newcomers. In 1635 he moved to Pharma, 30 km west of Novellara, where he began his philosophical research. The Jesuits ran three educational institutions, Burma, a university, a college for the sons of nobles, and a Jesuit college, founded in 1600. He was in Burma less than a year before being transferred to Bologna to complete his first year of philosophy.

After completing three years of philosophy, he taught rhetoric and humanities at Santa Lucia College in Bologna for four years, from 1638 to 1642. It was only when Grimaldi returned to Bologna in 1636 and taught there in 1640 that he began to assist Riccioli in experiments. Grimaldi, who worked under Riccioli's instruction, reduced the weight from the Asinelli tower and timed their fall using a pendulum. Riccioli believed that the experiments conducted by Grimaldi would refute Galileo's theories. First, Grimaldi and Riccioli measured by swinging a pendulum 24 hours a day. They used this 3-foot pendulum to measure the short pendulum they use for time. Grimaldi dropped wooden and lead balls from various heights from the Asinelli tower.

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I got a nice addition to the precision by chanting a group of music monks at a time with a swinging pendulum to help with the time. He found that the distance of the falling object was directly proportional to the square of the time. This test did not confirm Galileo's conclusion because, as one would expect, the leading balls reached the ground in front of the wooden balls in all the tests using different heights of the tower. The lead ball always hits the ground in front of the tree when it falls from the same height. The discrepancy between the test and Galileo's claim. Grimaldi thought they had reached the bottom at the same time, and Grimaldi thought Galileo should have known about it.

Over the next few years, Grimaldi continued to study, but especially in astronomical investigations, working with Riccioli. He studied theology between 1642 and 1645. It did further research on the philosophy. Thus he was awarded a doctorate in 1647. Then he began to teach philosophy. He found that when light passes through a thin hole it spreads around and its name is the edge effect. He was the first to discover this. The great scientist Francisco passed away on December 28, 1663, at the age of 45.

Source By: Wikipedia

Information: Ramesh, Assistant Professor of Physics, Nehru Memorial College, Puthanampatti, Trichy.