Question

Red light has a wavelength of 700 nm and a frequency of 4.3 x 1014 s-1. What is the energy of a single photon of red light?

A. 2.85 x 10-34 J
B. 2.85 x 1019 J
C. 2.85 x 10-20 J
D. 2.85 x 10-19 J

Answer 1

E = h*freqency or
E = hc/wavelength in m

Answer 2

What is the frequency of a photon of red light with wavelength 670 nm ?

Answer 3

23