Discussion
The number of waves made by an electron moving in an orbit having maximum magnetic quantum number is +3
Answer: A
The electron makes 4 waves.
A magnetic quantum number of \(m_l=+3\) requires \(l\ge 3\), and since \(l\) can be at most \(n-1\), the smallest possible principal quantum number is \(n=4\).
De Broglie's condition for a stable orbit is \[2\pi r = n\lambda\] so the number of complete waves in the orbit equals \(n\), giving 4.
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