Question
Biology Question on Cell: the unit of life
Electron microscope has a high resolution power. This is due to
A
Electromagnetic lenses
B
Very low wavelength of electron beam
C
Low wavelength of light source used
D
High numerical aperture of glass lenses used.
Answer
Very low wavelength of electron beam
Explanation
Solution
Electron microscope has a high resolution power. This is due to very low wavelength of electron beam (0.005 mu) of the electron beam used as light source. It is produced when a metal filament is heated in a vaccum tube at high temperature, i.e., 50,000 volts.