A particular hydrogen like ion emits radiation of frequency 2 . 92 × 10 15 Hz when it makes transition from n = 3 to n = 1 . The frequency in Hz of radiation emitted in transition from n = 2 to n = 1 will be:

Step-by-step solution

As we know, ν ∝ 1 n 1 2 − 1 n 2 2 2.92 × 10 15 ν = 1 1 − 1 9 1 1 − 1 4 ν = 2.92 × 10 15 × 3 4 × 9 8 ν = 2.46 × 10 15   Hz