1.

Calculate de Broglie wavelength associated with an electron moving with a speed of 2 xx 10^(5) ms^(-1). Given h = 6.625 xx 10^(-34)JS, m_(e) = 9.11 xx 10^(-31)kg.

Answer»

Solution :Given `v= 2XX 10^5ms^(-1)` ,`h =6.625 xx 10^(-34)` Js,
`m_c=9.11 xx 10^(-31)`kg
w.k.t.
`lambda=h/(MV) =(6.625xx10^(-34))/(9.11xx10^(-31)xx2xx10^5)` i.e.,
`lambda=3.636xx10^(-9) m =3.636` nm


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