Home /
Expert Answers /
Physics /
the-magnification-of-a-microscope-depends-inversely-on-the-wavelength-used-to-image-a-specimen-th-pa148

The magnification of a microscope depends inversely on the wavelength used to image a specimen. The very best quality light microscopes typically have maximum magnifications of 1000 – 4000 times. Modern TEMs use electrons accelerated to energies of over 100 keV to observe specimens. Estimate the possible range of magnifications that can be achieved using a TEM by considering the following : a) What is a reasonable choice for the wavelength used in a light microscope ? b) What is the wavelength of a 100 keV electron ? (show the calculations). Use the formula \lambda =h/mv to determine the wavelength of the electron. m is the mass of the electron and v is the velocity of the electron. c) How do the wavelengths of the light and of the electrons compare ?