Igcse Model Questions Vol1 2023 Physics Question 34

Practice objective / multiple choice question 34 from the 2023 Igcse Model Questions Vol1 Physics examination.

Igcse Model Questions Vol1 2023 Physics Objective / Multiple Choice Hard Difficulty
Question 34 IGCSE_MODEL_QUESTIONS_VOL1 • 2023 • PHYSICS • objective

An electron in a hydrogen atom makes a transition from the \(n=5\) level to the \(n=2\) level. (a) Calculate the wavelength of the photon emitted (in nanometres, to three significant figures). (b) Using the Bohr model, find the radius of the electron's orbit in the \(n=5\) state (in nanometres, to two significant figures). (c) The atom is placed in a uniform magnetic field of \(2.0\ \text{T}\). Assuming the orbital angular momentum quantum number \(l=4\) for the \(n=5\) level, determine the energy separation between adjacent magnetic sub‑levels (i.e., between successive \(m_{l}\) values) in electron‑volts (to two significant figures).

Answer Options

A. λ = 410 nm, r = 1.5 nm, Zeeman splitting = 9.0×10⁻⁵ eV
B. λ = 500 nm, r = 0.9 nm, Zeeman splitting = 2.0×10⁻⁴ eV
C. λ = 460 nm, r = 1.1 nm, Zeeman splitting = 1.5×10⁻⁴ eV
Correct Answer D. λ = 434 nm, r = 1.3 nm, Zeeman splitting = 1.2×10⁻⁴ eV
Correct Answer
D
Correct Option:
λ = 434 nm, r = 1.3 nm, Zeeman splitting = 1.2×10⁻⁴ eV

About This Question

This is Igcse Model Questions Vol1 2023 Physics Question 34. It is one of the objective questions from the 2023 Igcse Model Questions Vol1 Physics examination.

Difficulty level: Hard .

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