Find energy of each of the photons which
a. correspond to light of frequency `3xx10^(15) Hz`.
b. have wavelength of `0.50 Å`.

Explanation

(i) `v = 3 xx 10^(15) Hz, E = hv = (6.626 xx 10^(-34) Js) (3 xx 10^(15) s^(-1)) = 1.988 xx 10^(-18) J`
(ii) `lamda = 0.50 xx 10^(-10) m, E = hv = h (c)/(lamda) = ((6.626 xx 10^(-34) Js) (3 xx 10^(15)s^(-1)))/(0.50 xx 10^(-10) s) J = 3.98 xx 10^(-15) J`