The longest wavelength of Lyman series is equal to?
Correct answer: C. 4/3 RH
- A. 1/RH
- B. 9/RH
- C. 4/3 RH
- D. 4/2RH
Explanation
Explanation:The Lyman series corresponds to transitions to the n = 1 energy level in the hydrogen atom.The longest wavelength corresponds to the transition from n = 2 to n = 1, which has the smallest energy difference.Using the Rydberg formula: 1/λ = RH (1/n₁² - 1/n₂²), where n₁ = 1 and n₂ = 2.1/λ = RH (1/1² - 1/2²) = RH (1 - 1/4) = RH (3/4).Therefore λ = 4/(3RH)
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