The hydrogen spectrum consists of several spectral lines in Lyman series (L₁, L₂, L₃ ….; L₁ has lowest energy among Lyman series). Similarly it consists of several spectral lines in Balmer series (B₁, B₂, B₃……. ; B₁ has lowest energy among Balmer lines). The energy of L₁ is x times the energy of B₁. The value of x is ______ × 10^–1 (Nearest inteter)