What will be the ratio of de-Broglie wavelengths of proton and \[\alph – McqOptions

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1.	What will be the ratio of de-Broglie wavelengths of proton and \[\alpha -\]particle of same energy [RPET 1991, 96; DCE 2002; Kerala PET 2005]
A.	2 : 1
B.	1 : 2
C.	4 : 1
D.	1 : 4
Answer» B. 1 : 2

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