Question: An electron with a speed of 2.1 10 6 m/s collides with a hydrogen atom, exciting the atom to the highest possible energy level.

An electron with a speed of 2.1 × 10⁶ m/s collides with a hydrogen atom, exciting the atom to the highest possible energy level. The atom then undergoes a quantum jump with Δn = 1. What is the wavelength of the photon emitted in the quantum jump?

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