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An alpha- particle and a proton are accelerated from rest by a potential difference of 100 V. After this, their de Broglie wavelengths are and lamda_(a) and lamda_(p) respectively. The ratio (lamda_(p))/(lamda_(a) to the nearest integer, is ...............

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Solution :`lambda=(h)/(sqrt(2mE)) "" :. lambda PROP(1)/(sqrt(mE))`
`:.(lambda_(p))/(lambda_(a))= sqrt((m_(a)E_(a))/(m_(p)E_(p)))= sqrt((4xx2E)/(E))=2 sqrt(2)~~3`
`:.E_(p)=EV and E_(prop)= 2eV`


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