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A particular hydrogen like ion emits radiation of frequency 2.92 × 1015 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 :

(1) 0.44 × 1015

(2) 6.57 × 1015

(3) 4.38 × 1015

(4) 2.46 × 1015

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