1.

Calculate the wavelength o fan electron moving with a velocity of 2.05xx10^(7)ms^(-1).

Answer»

Solution :According to de Broglie.s equation,`gamma=H/(mv)`
Mass of electron(m)`=9.1xx10^(-31)kg`
velocity F electron(v)`=2.05xx10^(7)ms^(-1)`
Planck.s CONSTANT(h)`=6.626xx10^(-34)kgm^(2)s^(-1)`
`gamma((6.626xx10^(-34)Kgm^(2)s^(-1)))/((9.1xx10^(-31)Kg)XX(2.05xx10^(7)ms^(-1)))=3.55xx10^(-4)m`


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