Question 1

Who was Robert Hooke and why is he famous?

Accepted Answer

Robert Hooke (1635-1703) was an English polymath and a key figure of the Royal Society. The main thing to remember is that he was both the father of modern microscopy, thanks to his book Micrographia (1665) in which he coined the word “cell,” and the physicist who formulated the law of elasticity (Hooke's law). Less well known than Isaac Newton, he was nevertheless one of the most inventive experimenters of the 17th century, working in astronomy, clockmaking and architecture after the Great Fire of London.

Question 2

What is the historical significance of Hooke's Micrographia?

Accepted Answer

Published in 1665, Micrographia was the first great illustrated book of microscopy. What is striking about it is that it made a completely unknown world visible: insects, plants, cells. To understand this, you have to remember that at the time no one had imagined that a piece of cork contained thousands of tiny cavities. Hooke named them “cells” (from the Latin cella, small room), a term that would become fundamental in biology. The book also popularised science among the general public thanks to its spectacular engravings.

Question 3

How did Hooke take part in the rebuilding of London after the 1666 fire?

Accepted Answer

After the Great Fire of London in 1666, Hooke became one of the surveyors charged with redesigning the city alongside the architect Christopher Wren. What is often forgotten is that he did not merely measure plots of land: he designed the Monument to the Great Fire of London, a stone column 61 metres high that also serves as a scientific instrument (a vertical telescope for astronomy experiments). His work helped give London its modern face, with wider streets and brick buildings.

Question 4

Why were Hooke and Newton in conflict?

Accepted Answer

The rivalry between Hooke and Isaac Newton is one of the most famous in the history of science. Their quarrel concerned the nature of light (Hooke criticised Newton's theory of colours) and, above all, gravitation: Hooke claimed to have had the idea of a force inversely proportional to the square of the distance before Newton. What sets this conflict apart is its lasting impact: furious, Newton is said to have removed almost every mention of Hooke from his Principia (1687). Legend even has it that no reliable portrait of Hooke survived, perhaps because of this enmity.

Question 5

What did a typical day in Robert Hooke's life look like?

Accepted Answer

Picture a hyperactive scholar, constantly on the move. In the morning, Hooke would rise early, note the weather on his barometer, then prepare the experiments he was to present to the Royal Society. In the afternoon, he would walk through London to supervise the rebuilding sites or receive craftsmen in his laboratory at Gresham College. In the evening, he would meet Christopher Wren in a coffee house to discuss science. The main thing to remember is that his life was an exhausting mixture of research, architecture and social life, which explains his frequent headaches.

Question 6

What characteristic objects did Hooke use in his work?

Accepted Answer

Hooke perfected several instruments that became emblematic. The compound microscope (with several lenses) allowed him to produce the engravings of Micrographia – he added a lamp to it to light up the specimen. The helical spring is the very object of his law of elasticity, but he also used it in clocks. He also built a Gregorian telescope to observe the Moon and a wheel barometer for his daily weather readings. What is striking is that he was both the inventor and the user of these tools.

Question 7

What does the Latin phrase “Ut tensio, sic vis” mean?

Accepted Answer

It is the original formulation of Hooke's law (1678). Translated, it means “as the extension, so the force”: the more you stretch a spring, the greater the force it exerts to return to its initial position. The main thing to remember is that Hooke first published this phrase as an anagram (ceiiinosssttuv) in 1676 in order to protect his discovery while proving his priority – a common practice at the time. Today, this law is taught in every physics class.

Question 8

What was the relationship between Hooke and the Royal Society?

Accepted Answer

Hooke was appointed Curator of Experiments (Curator of Experiments) of the Royal Society as early as 1662. What is remarkable is that this position required him to present several new experiments each week before the scholars – an exhausting pace that drove him to explore almost every scientific field. He was, in a way, the “chief experimenter” of the first modern learned society, a role that existed nowhere else. This made him one of the most versatile scientists of his time.

Question 9

Where can traces of Hooke's work still be seen today?

Accepted Answer

Several places in London bear his mark. The Monument (Pudding Lane) is still standing, a stone column he co-designed with Christopher Wren. Gresham College, where he lived and worked, today houses a commemorative plaque. At Oxford, the university where he studied and assisted Robert Boyle, you can see a replica of his vacuum pump. What is often forgotten is that the churchyard of St Helen's Bishopsgate, where he was buried, has lost his grave – a possible consequence of the rivalry with Newton.

Question 10

Which word coined by Hooke is still used in biology today?

Accepted Answer

The word “cell”! While observing a thin slice of cork under the microscope, Hooke saw small cavities that reminded him of the cells (small rooms) of monks in a monastery. He called them cells in Micrographia (1665). The main thing to remember is that Hooke did not discover the living cell (he was seeing the empty walls of dead cells), but he gave it the name that would become central in biology. Today, the word “cell” denotes the basic unit of life.

Question 11

How did Hooke anticipate the discovery of oxygen?

Accepted Answer

In Micrographia (1665) and in his later work, Hooke sensed that a component of the air was necessary for both combustion and respiration. He imagined that the air contained a substance that sustained both fire and life – an idea close to what Lavoisier would later call oxygen. What sets Hooke apart is that he did not isolate this gas, but he formulated the hypothesis with a clarity that was remarkable for the time. To understand this, you have to remember that chemistry was still dominated by the theory of the four elements.

Robert Hooke(1635 — 1703)

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