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What is the difference of angular momenta of an electron between two consecutive orbits in hydrogen atom?

Asked in GUJCET 2009 · Postulates, radius, speed and angular momentum

• (1) h/π
• (2) h/(2π)
• (3) h/2
• (4) (2π)/h

Step-by-step solution

Why the other options are wrong

• (1) h/π is the difference between orbits two apart, Δ n=2; consecutive orbits differ by Δ n=1.
• (3) h/2 loses the π from h/(2π).
• (4) (2π)/h is h/(2π) turned upside down, and it does not even have the unit of angular momentum (J⁻¹ s⁻¹ rather than J s).

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