Gce Model Questions Vol1 2020 Physics Question 22

Practice objective / multiple choice question 22 from the 2020 Gce Model Questions Vol1 Physics examination.

Gce Model Questions Vol1 2020 Physics Objective / Multiple Choice Hard Difficulty
Question 22 GCE_MODEL_QUESTIONS_VOL1 • 2020 • PHYSICS • objective

An electron in a singly ionised helium ion (\(\text{He}^{+}\)) makes a transition from the \(n=4\) level to the \(n=2\) level, emitting a photon. Taking the nuclear mass of helium as \(M = 4.0026\ \text{u}\) (where \(1\ \text{u}=1.6605\times10^{-27}\ \text{kg}\)), calculate the wavelength of the emitted photon. Use the Rydberg constant for infinite nuclear mass \(R_{\infty}=1.097373\times10^{7}\ \text{m}^{-1}\) and the electron mass \(m_{e}=9.109\times10^{-31}\ \text{kg}\).

Answer Options

Correct Answer A. 1.22\times10^{-7}\ \text{m} \;(\approx 121\ \text{nm})
B. 1.35\times10^{-7}\ \text{m} \;(\approx 135\ \text{nm})
C. 9.80\times10^{-8}\ \text{m} \;(\approx 98\ \text{nm})
D. 1.05\times10^{-7}\ \text{m} \;(\approx 105\ \text{nm})
Correct Answer
A
Correct Option:
1.22\times10^{-7}\ \text{m} \;(\approx 121\ \text{nm})

About This Question

This is Gce Model Questions Vol1 2020 Physics Question 22. It is one of the objective questions from the 2020 Gce Model Questions Vol1 Physics examination.

Difficulty level: Hard .

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