Question

What is the energy of a single photon of visible light with a wavelength of 500.0 nm? 1 nm = 10^-9 m
(Points : 5)
2.02 × 10^18 J

2.84 × 10^14 J

3.97 × 10^-19 J

4.95 × 10^-19 J

Answer 1

@Michele_Laino

Answer 2

here we have to use this formula:
\[E = h\nu = \frac{{hc}}{\lambda }\]
where h is the Planck's constant, namely
h=6.62*10^(-34) Joules*sec

Answer 3

\lambda is the wave length, and c= 3*10^8 m/sec is the light speed