Uncertainty Principle Using ΔEΔt ≥ ħ: an Ultraviolet Source Produces

Multiple Choice

Uncertainty principle using ΔEΔt ≥ ħ: An ultraviolet source produces a monochromatic beam of 200-nm light. A shutter allows a pulse to pass that is 10,000 wavelengths long. The uncertainty in the energy of a photon in this pulse is closest to which of the following? (ħ = 1.055 × 10^-34 J ∙ s = 6.59 × 10^-16 eV ∙ s, c = 3.00 × 10⁸ m/s)

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