The mass of an electron is 9.1×10–31 kg. If its K.E. is 3.0×10–25 J, calculate its wavelength.
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use , E = hv
where , v = frequency ,
c = vlambda
v = c/lambda
put this value ,
E = h/c lambda
where , v = frequency ,
c = vlambda
v = c/lambda
put this value ,
E = h/c lambda
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in the attachment above .....
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