Search results
Results from the WOW.Com Content Network
In 1665, Robert Hooke used a microscope about six inches long with two convex lenses inside and examined specimens under reflected light for the observations in his book Micrographia. Hooke also used a simpler microscope with a single lens for examining specimens with directly transmitted light, because this allowed for a clearer image. [4]
Robert Hooke FRS (/ h ʊ k /; 18 July 1635 – 3 March 1703) [4] [a] was an English polymath who was active as a physicist ("natural philosopher"), astronomer, geologist, meteorologist and architect. [5]
Since the invention of the microscope in the seventeenth century it has been known that plant and animal tissue is composed of cells : the cell was discovered by Robert Hooke. The plant cell wall was easily visible even with these early microscopes but no similar barrier was visible on animal cells, though it stood to reason that one must exist.
Barometer (Marine) – Robert Hooke [98] Bell's theorem – John Stewart Bell; Calculus – Sir Isaac Newton; Cell biology – Credit for the discovery of the first cells is given to Robert Hooke who described the microscopic compartments of cork cells in 1665 [198] Chromatography (Partition) – Richard Laurence Millington Synge and Archer J.P ...
Robert Hooke's discovery of cells in 1665 led to the proposal of the cell theory. Initially it was believed that all cells contained a hard cell wall since only plant cells could be observed at the time. [9] Microscopists focused on the cell wall for well over 150 years until advances in microscopy were made.
In 2007, Janice Neri, a professor of art history and visual culture, studied Hooke's artistic influences and processes with the help of some newly rediscovered notes and drawings that appear to show some of his work leading up to Micrographia. [5] She observes, "Hooke's use of the term "schema" to identify his plates indicates that he ...
1665: Correct theory of combustion first outlined in Micrographia by Robert Hooke (1635–1703); Hooke observed that something (known now as oxygen) is taken from the air and that in its absence combustion quickly ceases, however much heat is applied.
The double star nature of this system was discovered by Robert Hooke in 1664. [13] The two components have an angular separation of 7.606 arcseconds, [2] which can be resolved with a small telescope. The orbital period of the pair is greater than 5000 years. [14]