MDCAT Physics MCQ #374

A physicist wants to calculate the wavelength of the line emitted when an electron falls from the fourth orbit to the third orbit in a hydrogen atom.

MDCAT Physics MCQ #374

  1. Question 1

    Q1. A physicist wants to calculate the wavelength of the line emitted when an electron falls from the fourth orbit to the third orbit in a hydrogen atom.

    • A) λ = (R * (3^2) - R * (4^2)) * (1/Δk)
    • B) λ = (R * (3^2)) * (1/(Δk * (4^2)))
    • C) λ = (R * (4^2)) * (1/(Δk * (3^2)))
    • D) λ = (R * (3^2) * (4^2)) * (1/Δk)

    Answer: λ = (R * (3^2) - R * (4^2)) * (1/Δk)

    Explanation: Option A uses the formula for wavelength of the line emitted when an electron falls from a higher orbit to a lower orbit.