1.

Calculate the wavelength of an electron moving with a velocity of 2.05 × 107 m S-1.

Answer»

λ = \(\frac{h}{mv}\) 

\(\frac{6.626\times 10^{-34}Js}{9.1\times10^{-31}kg \times 2.05 \times 10^7ms^{-1}}\) 

= 3.55 x 10-11m.



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