Select the correct statements :

Options

A. The total intenesity of radiations (power emitted /surface area ) over all wavelingths is directluy proportional to fourth power of absolutie temperature during black body radiations .
B. The degeneracy of orbitals fo a sghell in absence of magenetic field exst only in one electron systems .
C. An irbutak cab be defucbed by for quantum numbers .
D. Agsorpotion spectera are used by asronomers to identify elements in the outer layer if stars.

Answer

A, B, D

Explanation

An orbital can be difined by only three quantum numbers.