When an electron is transisted from 2E to E energy level, the wavelength of resultant photon produced is ${\mathrm{\lambda }}_1$ . If electronic transition involves 4/3 E to E level, the wavelength of resultant photon is ${\mathrm{\lambda }}_2$ . The correct relation between ${\mathrm{\lambda }}_1\mathrm{\&}{\mathrm{\lambda }}_2 \mathrm{is} {\mathrm{\lambda }}_2={\mathrm{x\lambda }}_1$ . Then find the value of x ?