QJEEM24Phbd26: JEE Main 2024 Physics - Class 12 JEEM24Phbd26 Solution: When a hydrogen atom going from n = 2 to n = 1 emits a photon,…

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QJEEM24Phbd26: JEE Main 2024 Physics - Class 12 JEEM24Phbd26 Solution: When a hydrogen atom going from n = 2 to n = 1 emits a photon,…

When a hydrogen atom going from $n = 2$ to $n = 1$ emits a photon, its recoil speed is $\frac{x}{5} m / s$ . Where $x =$ ________. (Use, mass of hydrogen atom $= 1.6 \times 10^{- 27} kg$ )

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JEE Main 2024 (Online) 29th January Morning Shift Physics - Atoms and Nuclei Question 34 English Explanation

$\begin{aligned} Δ E = 10.2 eV \\ Recoil speed (v) = \frac{Δ E}{mc} \\ = \frac{10.2 eV}{1.6 \times 10^{- 27} \times 3 \times 10^{8}} \\ = \frac{10.2 \times 1.6 \times 10^{- 19}}{1.6 \times 10^{- 27} \times 3 \times 10^{8}} \\ v = 3.4 m / s = \frac{17}{5} m / s \end{aligned}$

Therefore, $x = 17$

QJEEM24Phbd26: JEE Main 2024 Physics - Class 12 JEEM24Phbd26 Solution: When a hydrogen atom going from n = 2 to n = 1 emits a photon,…

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