Microscopes

Question 1

what is an electron microscope

Answer 1

an microscope which uses electrons to form a grey-scale image

Question 2

difference between a light and electron microscope

Answer 2

• electron microscope uses electron beams instead of light and uses electron lense
• it has a higher resolution and magnification than light

Question 3

what is resolution

Answer 3

the smallest change that can be measured by an instrument or the ability to distinguish between two points, giving a sharper image

Question 4

wavelength of light microscope

Answer 4

400 to 700nm

Question 5

wavelength of electron beam

Answer 5

1nm

Question 6

magnification of electron microscope

Answer 6

2 million

Question 7

magnification of light microscope

Answer 7

1000 to 2000

Question 8

why do electron microscopes have higher resolution

Answer 8

• because of the length of its wavelength

- electron beam wavelength is a lot smaller

Question 9

what do electron microscopes produce

Answer 9

greyscale images

Question 10

formula of magnification

Answer 10

length of object = length of magnified object / magnification

Question 11

centimeter is… (cm)

Answer 11

1x10^-2 meters

Question 12

millimeter is… (mm)

Answer 12

1x10^-3 meters

Question 13

micrometer is… (um)

Answer 13

1x10^-6 meters

Question 14

nanometer is… (nm)

Answer 14

1x10^-9 meters

Question 15

picometer is… (pm)

Answer 15

1x10^-12 meters

Question 16

what is an electron microscope in terms of characteristics

Answer 16

a microscope with high magnification and resolution

Question 17

what do electron microscopes allow us to see

Answer 17

internal structures of mitochondria and chloroplasts, even ribosomes and plasmids

Question 18

in the formula triangle for length of magnified object, magnification and length of object, which is at the top of the triangle

Answer 18

length of magnified object