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A certain diatomic molecule absorbs energy by rotating. The first excited rotational state is at an...

A certain diatomic molecule absorbs energy by rotating. The first excited rotational state is at an energy of 0.10 eV above the ground state. What is the energy of the second excited rotational state above the ground state? (a) 0.15 eV (b) 0.20 eV (c) 0.30 eV (d) 0.40 eV

The answer is C please show me how it is that.

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