Which of the following transitions in hydrogen atom produces longest wavelength of radiation (or photon of minimum energy)?

n = 2, p = 4

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n = 3, p = 4

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n = 6, p = 8

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n = 5, p = 6

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Solution

The correct option is D n = 6, p = 8
Higher the value of the principle quantum number to which electron is jumping, longer will be the wavelength. So, n = 6, p = 8 transition produces longest wavelength.

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