Transmission Electron Microscope and Scanning Electron Microscope

 

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Transmission Electron Microscope and Scanning Electron Microscope

Question 1
Which among the following helps us in getting a three-dimensional picture of the specimen?
A
Transmission Electron Microscope
B
Scanning Electron Microscope
C
Compound Microscope
D
Simple Microscope

Question 2
Which of the following are true for electron microscopy?
A
specimen should be thin and dry
B
image is obtained on a phosphorescent screen
C
electron beam must pass through evacuated chamber
D
specimen should be thin and dry, image is obtained on a phosphorescent screen and electron beam must pass through evacuated chamber

Question 3
Electron Microscope can give a magnification up to .....
A
400, 000X
B
100, 000X
C
15000X
D
100X

Question 4
Where do we obtain the magnified image of the specimen in SEM?
A
cathode ray tube
B
phosphorescent screen
C
anode
D
scanning generator

Question 5
Negative Staining is used for examining .....
A
virus particles
B
protein molecules
C
bacterial flagella
D
virus particles, protein molecules and bacterial flagella

Question 6
The secondary electrons radiated back in scanning microscope is collected by?
A
specimen
B
anode
C
vacuum chamber
D
cathode

Question 7
On what factors do the intensity of secondary electrons depends upon?
A
shape of the irradiated object
B
chemical composition of the irradiated object
C
number of electrons ejected
D
size and chemical composition of the irradiated object, number of electrons ejected and on the number of electrons reabsorbed by surrounding

Question 8
Degree of scattering in transmission electron microscope is a function of .....
A
wavelength of electron beam used
B
number of atoms that lie in the electron path
C
number and mass of atoms that lie in the electron path
D
mass of atoms that lie in the electron path

Question 9
Which of the following is used in electron microscope?
A
electron beams
B
magnetic fields
C
light waves
D
electron beams and magnetic fields

Question 10
Which of the following techniques are used in Transmission Electron Microscopy (TEM) for examining cellular structure?
A
Negative-Staining
B
Shadow Casting
C
Ultrathin Sectioning
D
Negative-Staining, Shadow Casting, Ultrathin Sectioning, Freeze-Etching
There are 10 questions to complete.

 

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