HC Verma: Concepts of Physics - Volume 2 Bohr's Model and Physics of the Atom Pages 384-386: Q40 Solution: Radiation from hydrogen discharge tube falls on a cesium plate. …

QPages 384-386: Q40: HC Verma: Concepts of Physics - Volume 2 Bohr's Model and Physics of the Atom Pages 384-386: Q40 Solution: Radiation from hydrogen discharge tube falls on a cesium plate. …

⚠️ Common Exam Traps & Conceptual Pitfalls

Students often mistakenly use the lowest energy visible transition (Balmer series, $n=2 \to 1$) or the ground state energy ($13.6$ eV) directly without subtracting the work function. To find the maximum kinetic energy, you must identify the highest energy photon emitted, which corresponds to the Lyman limit ($n=\infty \to 1$) with energy $13.6$ eV, and then subtract the work function ($1.9$ eV) to get $11.7$ eV.

Radiation from hydrogen discharge tube falls on a cesium plate. Find the maximum possible kinetic energy of the photoelectrons. Work function of cesium is 1.9 eV.

Step-by-Step Verified Solution

**Answer:** Maximum kinetic energy = 11.7 eV. **Step-by-Step Explanation:** The highest energy photon from hydrogen discharge is from n=� to n=1 (Lyman limit) = 13.6 eV. KE_max = 13.6 _ 1.9 = 11.7 eV [citation:3].

QPages 384-386: Q40: HC Verma: Concepts of Physics - Volume 2 Bohr's Model and Physics of the Atom Pages 384-386: Q40 Solution: Radiation from hydrogen discharge tube falls on a cesium plate. …

Step-by-Step Verified Solution

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