In an electron microscope, electrons are accelerated to great velocities. calculate the wavelength of an electron traveling with a velocity of 7.0 x 106 ms-1. the mass of an electron is 9.1 x 10-28 g.

Wavelength,

Explanation:

It is given that,

Velocity of an electron,

Mass of an electron,

We need to find the wavelength of an electron. It can be calculated using the De- Broglie wavelength as :

So, the wavelength of an electron is . Hence, this is the required solution.

massxgravity x heght=weightxheight= pe

4900=490xh

h=10