Transmission Electron Microscope and Scanning Electron Microscope
Which among the following helps us in getting a three-dimensional picture of the specimen?
Transmission Electron Microscope
Scanning Electron Microscope
Which of the following are true for electron microscopy?
specimen should be thin and dry
image is obtained on a phosphorescent screen
electron beam must pass through evacuated chamber
specimen should be thin and dry, image is obtained on a phosphorescent screen and electron beam must pass through evacuated chamber
Electron Microscope can give a magnification up to .....
Where do we obtain the magnified image of the specimen in SEM?
cathode ray tube
Negative Staining is used for examining .....
virus particles, protein molecules and bacterial flagella
The secondary electrons radiated back in scanning microscope is collected by?
On what factors do the intensity of secondary electrons depends upon?
shape of the irradiated object
chemical composition of the irradiated object
number of electrons ejected
size and chemical composition of the irradiated object, number of electrons ejected and on the number of electrons reabsorbed by surrounding
Degree of scattering in transmission electron microscope is a function of .....
wavelength of electron beam used
number of atoms that lie in the electron path
number and mass of atoms that lie in the electron path
mass of atoms that lie in the electron path
Which of the following is used in electron microscope?
electron beams and magnetic fields
Which of the following techniques are used in Transmission Electron Microscopy (TEM) for examining cellular structure?
Negative-Staining, Shadow Casting, Ultrathin Sectioning, Freeze-Etching
There are 10 questions to complete.