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paradox xyz cool Grade: 11
        

calculate de-Broglie wavelength of an electron travelling at 1% of the speed of light.


a) 2.73 x 10-24


b) 2.42 x 10-10


c) 242.2 x 1010


d) none of these


 


plz solve and explain the solution.....

6 years ago

Answers : (2)

AJAY LOGESH
16 Points
										

 


 


                    λ = h/mc 


         In your problem, velocity = c/100 ( since the velocity is 1 %)


                     Sub c=c/100 in above equation, You will get λ = 100 h/mc


                                     Sub values of h,m and c. Arrange the powers of 10. The answer will be 2.42 x 10-10.


                  So, Your answer will be (b) 2042 x 10-10.  Hope you understand. Do well.

6 years ago
vikas askiitian expert
510 Points
										

(lamda) = h/mv              (h is planks constant , h = 6.6*10-34 & m is mass of particle)


 v = 1% of speed of light = C/100                 (C is speed of light & C=3*108)


lamda = h/mv


          =100h/mC                                 (m = 9.1*10-31kg , mass of electron)


 


        = 0.241*10-9 m


       =0.241nm      or 2.41(angstorm)


 


 

6 years ago
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