De-broglie wavelength of an electron moving with a velocity, Chemistry

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What will be de-Broglie wavelength of an electron moving with a velocity of 1.2 x 10 5 ms-1:

(1)  6.068x 10-9  

(2) 3.133 x 10 -37             

(3) 6.626x 10-9 

(4) 6.018x 10-7

Ans:  6.626x 10-9

 


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