1.2 Microscopes

Question 1

Microscopes

Answer 1

Scientific instruments used to visualize objects too small to see with the naked eye

Question 2

Microscopic

Answer 2

A description of something too small to bee seen by the naked eye

Question 3

Microscopy

Answer 3

The science of investigating using a microscope

Question 4

History of the light microscope

Answer 4

Earliest compound lens light microscope appears in Europe ~1620, and has various claims regarding the inventor

Question 5

First description of cells

Answer 5

1665, Robert Hooke
Published findings into Micrographia

Question 6

“animalcules”

Answer 6

1676, Anton van Leeuwenhoek observed motile objects which were actually just bacteria and protozoa

Question 7

Light microscope

Answer 7

• uses lenses to bend light and magnify images by roughly 100-fold
• can be used to view living things in natural colour without killing/freezing them
• chemical dyes and fluorescent lighting may be used to clearly see specific structures

Question 8

Calculation of magnification of specimen

Answer 8

Magnification = Objective lens x Eyepiece (ocular) lens

Question 9

Calculation of magnification from image

Answer 9

Magnification = Image size/Actual size
(M.I.A)

Question 10

Calculation of actual size from image

Answer 10

Actual size = Image size/Magnification
(A.I.M)

Question 11

Electron microscopes

Answer 11

a type of very powerful microscope that uses electrons instead of light to produce a magnified image of something.