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The wave lengths of electron waves in two orbits is $3:5$ The ratio of kinetic energy of electrons will be :

\[\begin {array} {1 1} (1)\;25:9 & \quad (2)\;5:3 \\ (3)\;9:25 & \quad (4)\;3:5 \end {array}\]
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(1) 25:9
answered Nov 7, 2013 by pady_1

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