If the binding energy of an electron is 6.41 × 10^{− 19} J, what wavelength of photon is required to liberate it from the atom? Planck's constant = 6.626 × 10^{− 34} J ⋅ s; c = 3.00 × 10⁸ m/s A) 311 nm B) 641 nm C) 1.53 μ m D) 2.18 μ m

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Quizplus · Accepted Answer

The energy of a photon is given by E = hc/λ. Solving for λ gives λ = hc/E. Substituting the given values, λ = (6.626 × 10^−34 J⋅s)(3.00 × 10^8 m/s) / (6.41 × 10^−19 J) = 3.11 × 10^−7 m = 311 nm.

If the Binding Energy of an Electron Is 6