Atoms and Nuclei Part 2

A light of energy 12.75‌eV is incident on a hydrogen atom in its ground state. The atom absorbs the radiation and reaches to one of its excited states. The angular momentum of the atom in the excited state is ‌

x

π

×10−17‌eVs. The value of x is _______ (use h=4.14×10−15‌eVs,c=3×108 ms−1)