A Laser Produces a Beam of 4000-Nm Light

question 11

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

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