Microscopy and spec week 7

Question 1

What is the primary purpose of optical microscopy?

Answer 1

To magnify small objects using visible light.

Question 2

True or False: Polarising microscopy is used to examine birefringent materials.

Answer 2

True.

Question 3

Fill in the blank: The technique used to visualize surfaces of materials at high magnification is called __________.

Answer 3

Scanning Electron Microscopy (SEM).

Question 4

What does EDS stand for in the context of electron microscopy?

Answer 4

Energy Dispersive Spectroscopy.

Question 5

What is the main advantage of Transmission Electron Microscopy (TEM)?

Answer 5

It provides high-resolution images at the atomic level.

Question 6

Which microscopy technique uses a beam of electrons to scan the surface of a specimen?

Answer 6

Scanning Electron Microscopy (SEM).

Question 7

What is the primary function of Auger Electron Spectroscopy (AES)?

Answer 7

To analyze the surface composition of materials.

Question 8

True or False: High-Resolution Transmission Electron Microscopy (HRTEM) can resolve individual atoms.

Answer 8

True.

Question 9

What does the acronym STEM stand for?

Answer 9

Scanning Transmission Electron Microscopy.

Question 10

Which technique is primarily used for elemental analysis in materials science?

Answer 10

Energy Dispersive X-ray Spectroscopy (EDX).

Question 11

What is the role of Cathodoluminescence (CL) in microscopy?

Answer 11

To study the optical properties of materials.

Question 12

Fill in the blank: The technique that uses electrons to excite atoms and analyze emitted electrons is called __________.

Answer 12

Electron Energy Loss Spectroscopy (EELS).

Question 13

What is the main difference between EDS and EDX?

Answer 13

There is no difference; both refer to Energy Dispersive X-ray Spectroscopy.

Question 14

What type of microscopy would you use to observe the internal structure of a thin specimen?

Answer 14

Transmission Electron Microscopy (TEM).

Question 15

True or False: Scanning Electron Microscopy (SEM) provides 3D images of the specimen surface.

Answer 15

True.

Question 16

What is the typical resolution limit of optical microscopy?

Answer 16

Approximately 200 nanometers.

Question 17

What does EMPA stand for?

Answer 17

Electron Microprobe Analysis.

Question 18

Fill in the blank: __________ microscopy is particularly useful for studying crystalline materials.

Answer 18

Polarising.

Question 19

What is one advantage of using High Angle Annular Dark Field (HAADF) imaging in STEM?

Answer 19

It provides contrast based on atomic number.

Question 20

What type of imaging technique allows for the observation of light emitted from a sample after electron beam excitation?

Answer 20

Cathodoluminescence (CL).

Question 21

Which microscopy technique can provide chemical information about the sample?

Answer 21

Energy Dispersive Spectroscopy (EDS).

Question 22

What does the term ‘birefringence’ refer to in polarising microscopy?

Answer 22

The optical property of a material that has different refractive indices in different directions.

Question 23

True or False: EELS can provide information about the electronic structure of materials.

Answer 23

True.

Question 24

What principle does Scanning Electron Microscopy (SEM) rely on?

Answer 24

The interaction of a focused electron beam with the sample surface.

Question 25

Fill in the blank: The __________ technique is used to examine the elemental composition of materials at the nanoscale.

Answer 25

Auger Electron Spectroscopy (AES).