Igcse Model Questions Vol1 2019 Physics Question 32
Practice objective / multiple choice question 32 from the 2019 Igcse Model Questions Vol1 Physics examination.
A hydrogen‑like ion emits a photon when an electron drops from the n = 3 level to the n = 2 level. The wavelength of this photon is measured to be 73.0 nm. (i) Determine the atomic number Z of the ion. (ii) Using the Bohr model, calculate the speed of the electron while it was in the n = 3 orbit. Take the fine‑structure constant \(\alpha = 1/137\) and the speed of light \(c = 3.00 \times 10^{8}\) m s\(^{-1}\).
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This is Igcse Model Questions Vol1 2019 Physics Question 32. It is one of the objective questions from the 2019 Igcse Model Questions Vol1 Physics examination.
Difficulty level: Hard .
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