આવૃતિ $(v) = 1368\, kHz = 1368 \times 10^3 \,Hz = 1368 \times 10^3 \,s^{-1}$
$\lambda \, = \frac{c}{v}\,\,\,\,\,\therefore \,\,\, = \,\,\frac{{3\, \times {{10}^8}\,m{s^{ - 1}}}}{{1368\, \times \,{{10}^3}\,{s^{ - 1}}}}\,\,\,\therefore \,\,\lambda \,\, = \,\,219.3\,m$
$(C= 3 \times 10^8 \,ms^{-1},N_A = 6.02 \times 10^{23} mol^{-1}).$