The frequency of a photon associated with an energy of `3.31eV` is ( given `h=6.62xx10^(-34) Js`)

Calculate the frequency associated with a photon of energy 3.3 xx 10^(-20) J (h=6.6 xx 10^(-34) Js) .

The frequency of a Photon having energy 100 eV is ...... Hz. (take h = 6.62 xx 10^(-34) Js, 1eV = 1.6 xx 10^(-19) J)

What is the frequency of a photon whose energy 66.3 eV ? Given : h = 6.63 xx 10^(-34) Js