Taking Rydberg's constant \(R_H=1.097 \times 10^7m\), first and second wavelength of Balmer series in hydrogen spectrum is
1
\(2000\buildrel _\circ \over {\mathrm{A}}\), \(3000\buildrel _\circ \over {\mathrm{A}}\)
2
\(1575\buildrel _\circ \over {\mathrm{A}}\), \(2960\buildrel _\circ \over {\mathrm{A}}\)
3
\(6529\buildrel _\circ \over {\mathrm{A}}\), \(4280\buildrel _\circ \over {\mathrm{A}}\)
4
\(6552\buildrel _\circ \over {\mathrm{A}}\), \(4863\buildrel _\circ \over {\mathrm{A}}\)