A Laser Produces a Beam of 4000-Nm Light

Multiple Choice

A laser produces a beam of 4000-nm light. A shutter allows a pulse of light, 30 ps in duration, to pass. Which of the following is closest to the uncertainty in the energy of a photon in the pulse? ( = 1.055 × 10^-34 J ∙ s = 6.59 × 10^-16 eV ∙ s)

A) 10^-6 eV
B) 10^-5 eV
C) 10^-4 eV
D) 10^-3 eV
E) 10^-2 eV