Gce Model Questions Vol1 2017 Physics Question 28

Practice objective / multiple choice question 28 from the 2017 Gce Model Questions Vol1 Physics examination.

Gce Model Questions Vol1 2017 Physics Objective / Multiple Choice Hard Difficulty
Question 28 GCE_MODEL_QUESTIONS_VOL1 • 2017 • PHYSICS • objective

In a hydrogen atom an electron is initially in the \(n = 3\) energy level. It absorbs a photon and jumps to the \(n = 5\) level, then subsequently falls to the \(n = 2\) level emitting a photon. (i) Using the Bohr model, calculate the wavelength of the emitted photon and show that it is consistent with the observed value of \(434\ \text{nm}\). (ii) Find the energy (in electron‑volts) of the photon absorbed in the \(3 \rightarrow 5\) transition. (iii) Determine the speed of the electron while it is in the \(n = 5\) orbit. Give your answers to three significant figures.

Answer Options

A. 1.12 eV; \(5.01\times10^{5}\) m s\(^{-1}\)
B. 0.845 eV; \(3.75\times10^{5}\) m s\(^{-1}\)
Correct Answer C. 0.967 eV; \(4.38\times10^{5}\) m s\(^{-1}\)
D. 1.05 eV; \(4.90\times10^{5}\) m s\(^{-1}\)
Correct Answer
C
Correct Option:
0.967 eV; \(4.38\times10^{5}\) m s\(^{-1}\)

About This Question

This is Gce Model Questions Vol1 2017 Physics Question 28. It is one of the objective questions from the 2017 Gce Model Questions Vol1 Physics examination.

Difficulty level: Hard .

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