explain In an electron microscope there is an electron gun that contains two cha

Question

explain

In an electron microscope there is an electron gun that contains two charged metallic pixels forces accelerates each electron in the beam from 7.705 of the speed of light over this distance. Determine the KE of the electron as leaves the electron gun electron carry this to a viewing screen where the microscopes image is formed making it below J For the electron passing between the places in the electron gun determine of the constant. electric force acting on the electron. N Determine the acceleration of the electron m/s2 Determine the time interval the electron speed between the places.

Explanation / Answer

here speed v = 0.077 * 3e8   = 2.31 e 8 m/s

so

a. KE of electron KE = 0.5 mv^2

KE   = 0.5* 9.11 e -31* 2.31 e 8 *2.31 e 8

KE = 2.4 e -14 Joules

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b. force between two charge F   = kq1q2/r^2

so

F = 9e9 * 1.6 e -19*1.6 e-19/(0.03* 0.03)

F = 2.56 e -25 N

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c. use Force F = m a

accleration a = F/m

a = 2.5 e -25 /9.11 e -31

a = 2.7 e 5 m/s^2

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D.

use S = 0.5 at^2

t^2 = 2S/a

t^2 = (2* 0.03)/2.7 e 5

t = 471.4 us

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