Mircroscopes

Question 0

What kind of microscopes were used by both renaissance scientists and students in biology?

Answer 0

Light microscope

Question 1

What are our main tools for exploring cells?

Answer 1

Microscopes

Question 2

light microscope def

Answer 2

optical instrument with lenses that bend visible light to magnify images and project them into a viewer’s eye

Question 3

magnification def

Answer 3

increase in the object’s apparent size compared with actual size

Question 4

resolving power definition

Answer 4

ability of an optical instrument to show two objects as separate

Question 5

Each optical instrument has a…

Answer 5

limit to its resolving power

Question 6

what’s the smallest resolving point the human eye can have?

Answer 6

1/10 millimeter

Question 7

resolving power of a light microscope?

Answer 7

0.2 micrometers

Question 8

what is the limit to resolving power?

Answer 8

1,000x

Question 9

When were cells first discovered?

Answer 9

1665

Question 10

Who discovered cells?

Answer 10

Robert Hooke

Question 11

What did this discovery lead to?

Answer 11

Cell theory

Question 12

What is cell theory?

Answer 12

all living things are composed of cells and all cells come from other cells

Question 13

When did biologists start using Electron Microscopes?

Answer 13

1950s

Question 14

how do em microscopes resolve objects?

Answer 14

using beams of electrons

Question 15

What is the best resolving power that modern day microscopes have?

Answer 15

0.2 nanometer

Question 16

What are scanning electron microscopes used for?

Answer 16

to study the detailed architecture on the surface of a cell

Question 17

what is the transmission electron microscope used for?

Answer 17

exploring the internal structure of a cell

Question 18

what must be done before using electron microscopes?

Answer 18

specimen must be killed and preserved

Question 19

what are light microscopes useful for?

Answer 19

observing living cells