The ratio of de Broglie wave lengths of two particles, having mass ratio 1 :   3 and kinetic energy…

The ratio of de Broglie wave lengths of two particles, having mass ratio 1: 3 and kinetic energy ratio 2: 1 is
  1. 3: 2
  2. 3:2
  3. 2:3
  4. 2: 3

Solution

λ=h2mKEmamb=13  ;  KEaKEb=21λaλb=mb ×KEbma×KEa=3×11×2=32.....

Asked in: AP EAMCET 2018 (25 Apr Shift 1)

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