The energies E1 and E2 of two radiations are 25 eV and 50 eV respectively. The relation between their wavelengths i.e., $\lambda $1 and $\lambda $2 will be
$\lambda $1 = $\lambda $2
$\lambda $1 = 2$\lambda $2
$\lambda $1 = 4$\lambda $2
$\lambda $1 = ${1 \over 2}$ $\lambda $2
Solution
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