Wavelength of photon having energy 1 eV would be — Atomic Structure Chemistry Question

💡 Solution & Explanation

$\lambda = \frac{hc}{E} = \frac{1240 \text{ eV}\cdot\text{nm}}{1 \text{ eV}} = 1240 \text{ nm} = 1240 \times 10^{-9} \text{ m} = 1.24 \times 10^{-6}$ m. Therefore, correct answer is B.