Neco Model Questions Vol1 2024 Physics Question 28

Practice objective / multiple choice question 28 from the 2024 Neco Model Questions Vol1 Physics examination.

Neco Model Questions Vol1 2024 Physics Objective / Multiple Choice Hard Difficulty
Question 28 NECO_MODEL_QUESTIONS_VOL1 • 2024 • PHYSICS • objective

A hydrogen atom in its ground state absorbs a photon and the electron is ejected with a kinetic energy of 5.0 eV. (i) Determine the wavelength of the photon. (ii) Find the de Broglie wavelength of the ejected electron. (Take \(h=6.626\times10^{-34}\,\text{J·s}\), \(c=3.00\times10^{8}\,\text{m·s}^{-1}\), \(m_{e}=9.109\times10^{-31}\,\text{kg}\), and \(1\,\text{eV}=1.602\times10^{-19}\,\text{J}\).)

Answer Options

Correct Answer A. λ_photon = 6.67×10⁻⁸ m (≈66.7 nm); λ_electron = 5.5×10⁻¹⁰ m (≈0.55 nm)
B. λ_photon = 5.00×10⁻⁸ m (≈50 nm); λ_electron = 7.0×10⁻¹⁰ m (≈0.70 nm)
C. λ_photon = 1.33×10⁻⁷ m (≈133 nm); λ_electron = 2.75×10⁻¹⁰ m (≈0.275 nm)
D. λ_photon = 6.67×10⁻⁸ m (≈66.7 nm); λ_electron = 1.10×10⁻⁹ m (≈1.10 nm)
Correct Answer
A
Correct Option:
λ_photon = 6.67×10⁻⁸ m (≈66.7 nm); λ_electron = 5.5×10⁻¹⁰ m (≈0.55 nm)

About This Question

This is Neco Model Questions Vol1 2024 Physics Question 28. It is one of the objective questions from the 2024 Neco Model Questions Vol1 Physics examination.

Difficulty level: Hard .

View More Neco Model Questions Vol1 2024 Physics Questions More Neco Model Questions Vol1 Practice Questions Back to Questions

Master the Exam!

You've seen a preview, but there are thousands more questions plus AI tutor to break down complex solutions.

Unlock Full Access Available for Android & Windows
Chat with Support