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If an electron in a hydrogen atom jumps from the \( 3^{\text {rd }} \) orbit to the \( 2^{\text {nd }} \) orbit, it emits a photon of wavelength
P \( \lambda \). When it jumps from the \( 4^{\text {th }} \) orbit to the \( 3^{\text {rd }} \) orbit,

W the corresponding wavelength of the photon will be
(a) \( \frac{16}{25} \lambda \)
(b) \( \frac{9}{16} \lambda \)
(c) \( \frac{20}{7} \lambda \)
(d) \( \frac{20}{13} \lambda \)
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