A hydrogen-like atom emits radiations of frequency 2.7×1015Hz when it makes a transition from n = 2 to n = 1. The frequency emitted in a transition from n = 3 to n = 1 will be
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a
1.8×1015Hz
b
3.2×1015Hz
c
4.7×105Hz
d
6.9×1015Hz
answer is B.
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Detailed Solution
f=cZ2R1n12−1n22 ⇒ 2.7×1015=cZ2R112−122 f′=cZ2R112−132 Divide and solve to get: f=3.2×1015Hz
A hydrogen-like atom emits radiations of frequency 2.7×1015Hz when it makes a transition from n = 2 to n = 1. The frequency emitted in a transition from n = 3 to n = 1 will be