2.3 More Microscopy

Question 1

Define ELECTRON MICROSCOPY

Answer 1

microscopy using a beam of electrons to illuminate a specimen, able to produce images with a higher resolution than light microscopes

Question 2

Magnification of electron microscopes

Answer 2

up to 500 000x resolution

Question 3

What is TRANSMISSION ELECTRON MICROSCOPY

TEM

Answer 3

when a beam of electrons is emitted through a specimen and focused to produce an image
has the smallest resolving power of 0.5nm

Question 4

What is SCANNING ELECTRON MICROSCOPY

SEM

Answer 4

when a beam of electrons is sent across the surface of a specimen, electrons are reflected back, collected and used to produce a 3D image
has a resolving power of 3-10nm

Question 5

What is LIGHT MICROSCOPY?

Answer 5

the use of light and glass lenses to enable the user to see an object that has been greatly magnified
resolving power of 200nm