Structure Of Atom

Frequency of the de-Broglie wave of electron in Bohr's first orbit of hydrogen atom is _________ \(\times 10^{13} \mathrm{~Hz}\) (nearest integer).

[Given : \(\mathrm{R}_{\mathrm{H}}\) (Rydberg constant) \(=2.18 \times 10^{-18} \mathrm{~J}, h\) (Plank's constant) \(=6.6 \times 10^{-34} \mathrm{~J} . \mathrm{s}\).]