question_answer

Calculate the wavelength of the first line of \[H{{e}^{+}}\] ion spectral series whose interval with extreme lines is \[{{\frac{1}{\lambda }}_{1}}-{{\frac{1}{\lambda }}_{2}}=2.7451\times {{10}^{4}}\,\,c{{m}^{-1}}\]

A)  4689 \[\overset{{}^\circ }{\mathop{A}}\,\]     

B)  1651 \[\overset{{}^\circ }{\mathop{A}}\,\]

C)  3039 \[\overset{{}^\circ }{\mathop{A}}\,\]     

D)   2175 \[\overset{{}^\circ }{\mathop{A}}\,\]