GENERAL HISTOLOGY

Detailed explanation-1: -Janssen was the son of a spectacle maker named Hans Janssen, in Middleburg, Holland, and while Zacharias is credited with inventing the compound microscope, most historians surmise that his father must have played a vital role, since Zacharias was still in his teens in the 1590s.

Detailed explanation-2: -The development of the microscope allowed scientists to make new insights into the body and disease. It’s not clear who invented the first microscope, but the Dutch spectacle maker Zacharias Janssen (b. 1585) is credited with making one of the earliest compound microscopes (ones that used two lenses) around 1600.

Detailed explanation-3: -The first compound microscopes date to 1590. These devices use more than one lens, a step above most single magnifying lenses or glasses. The actual inventor is contested because there were several people at work on them, but father and son team Hans and Zacharias Jensen are usually credited.

Detailed explanation-4: -1590 – Early microscope Zacharias Janssen and his son Hans place multiple lenses in a tube. They observe that viewed objects in front of the tube appear greatly enlarged. This is a forerunner of the compound microscope and the telescope.

Detailed explanation-5: -The Dutch spectacle maker Hans Janssen and his son Zacharias are generally credited with creating these compound microscopes.