Unit 1 - Microscope History

Question 1

1st Microscope

Answer 1

Zacharias Jansen in 1590:

• Had only one lens
• Some of his pictures were blurry and NONE of his Microscopes survived

Question 2

2nd Microscope

Answer 2

Galileo in 1609:

• Had the same two lenses + were like two little telescopes

Question 3

3rd Microscope

Answer 3

Robert Hooke in 1665:

• This was the first Microscope that had a screw to help it focus
• Before this people had to move the specimen to get it in focus

Question 4

4th Microscope

Answer 4

Van Leeuwenhoek in 1674:

• His Microscopes were very small
• They were made up of two flat and thin metal plates pushed together

Question 5

5th Microscope

Answer 5

Jospeh Jackson Lister in 1826:

• He made an achromatic lens which made up for a distortion called “chromatic aberration”
• ^happened due to diff wavelengths of light diffracted at diff angles
• His new lens made the coloured edge disappear

Question 6

6th Microscope

Answer 6

Ernst Abbe in the 1860s:

• Introduced the use of a condenser to give STRONG + EVEN lighting
• Made great improvements to the design of Microscopes

Question 7

7th Microscope

Answer 7

Ernst Ruska in 1931:

• Invented the FIRST ELECTRON microscope
• This had a much higher resolution than the light Microscopes