PhysicsMedium183×since 2002Q5990Radiation coming from transitions n = 2 to n = 1 of hydrogen atoms fall on He⁺ ions in n = 1 and n = 2 states. The possible transition of helium ions as they absorb energy from the radiation is :An = 1 →\to→ n = 4Bn = 2 →\to→ n = 5Cn = 2 →\to→ n = 4Dn = 2 →\to→ n = 3Check answerSkip