Question

(a) Calculate the frequency of a light wave with a wavelength of 9 ×

10-8 m. The speed of light is 3.0 x 108 m/sec. (b) what is energy of a
photon of this frequency?(calculated in part a) h= 6.626 x 10-34 J.s

Answer 1

c=f （lumbda）
3x10^8=f （9x10^-8）
then just do simple calculations

(b) E=hf, where h is given and we got f from (a)