12. -0.1 points 0/4 Submissions Used My Notes Ask Your The electron microscope h

Question

12. -0.1 points 0/4 Submissions Used My Notes Ask Your The electron microscope has been widely used to obtain highly magnified images or biological and other types of materials. When an electron is accelerated through a particular potential field, it attains a speed or 3.65 x 106 m/s. The mass of the electron is 9.11 x 10-31 kg. Planck's constant has the value h 6.63 x 1034 J-s. What is the characteristic wavelength of this electron? Wavelength . Is the wavelength comparable to the size of atoms? Yes, since atomic radii are on the order of 1-5 A No, since atomic radii are on the order of 1-5 A No, since atomic radii are on the order of 10-50 A.

Explanation / Answer

so, we have:

v = 3.65*10^6 m/s

mass, m = 9.11*10^-31 Kg

we have below equation to be used:

wavelength = Planck constant / (mass*velocity)

wavelength = (6.626*10^-34) / (9.11*10^-31*3.65*10^6)

wavelength = 1.99*10^-10 m

Answer: 1.99*10^-10 m

This is roughly 2 Ao

yes, since atomic radii are of order of 1-5 Ao

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