A hydrogen atom changes its state from n = 3 to n = 2. Due to recoil, the percentage change in the wave length of emitted light is approximately

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🧑‍🏫 Author: Aditya Bhatt Sir   |   🕒 Last Updated: July 13, 2025

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📘Question

A hydrogen atom changes its state from n = 3 to n = 2. Due to recoil, the percentage change in the wave length of emitted light is approximately 1 × 10^–n. The value of n is__________.  

[Given Rhc = 13.6 eV, hc = 1242 eV nm, h = 6.6 × 10^–34 J s, mass of the hydrogen atom = 1.6 × 10^–27 kg]                                              (JEE-2024)  

✅ Answer

A hydrogen atom changes its state from n = 3 to n = 2. Due to recoil, the percentage change in the wave length of emitted light is approximately 1 × 10^–n. The value of n is__________.   [Given Rhc = 13.6 eV, hc = 1242 eV nm, h = 6.6 × 10^–34 J s, mass of the hydrogen atom = 1.6 × 10^–27 kg] 

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