Life Science- Microscopes

Question 1

17th century

Answer 1

Microscopes with stronger lenses and greater magnifying power were developed.

Question 2

1590

Answer 2

Hans Jansen and his son, Zaccharias, invented the compound microscope.

Question 3

1665

Answer 3

English scientist Robert Hooke improved on Janssen’s design.

Question 4

1674

Answer 4

Anton van Leeuwenhoek designed and built microscopes with single lenses that could magnify objects 270 times.

Question 5

Compound microscope

Answer 5

Uses light and lenses to magnify a specimen.

Can’t magnify a specimen more than 1000 times.

Question 6

1930

Answer 6

Transmission Electron Microscope (TEM) invented in Germany by Ernst Ruska.
Uses a beam of electrons to magnify a specimen up to millions of times. Allows you to see cross-sections of cells and their internal details.

Question 7

1981

Answer 7

Gerd Binning and Heinrich Rohrer invented the Scanning Electron Microscope (SEM).
Electron bounce off the surface of a specimen, and so let you see the surface of cells and the cell structure in three dimensions.