Question

In presence of magnetic field, $d$-suborbit is:

• A. five-fold degenerate
• B. three-fold degenerate
• C. seven-fold degenerate
• D. non-degenerate

Answer 1

The correct option is A five-fold degenerate

In the presence of magnetic field(external),the orbitals of each subshell will fake up different orientationals.These orientations are represented using the magnetic quantum number$"m"$.

d-orbital$\to$$l=2$

$m_l$=$-2,-1,0,1,2$

$\Rightarrow$Five fold degenerate