A Round 085-Mm-Diameter Hole Is Illuminated by Infrared Light of Wavelength 2

Multiple Choice

A round 0.85-mm-diameter hole is illuminated by infrared light of wavelength 2.5 µm What is the angle of the first dark fringe in the resulting pattern?

A) $4.8 \times 10 ^ { - 2 }$ degrees
B) $0.21$ degrees
C) $1.2 \times 10 ^ { - 2 }$ degrees
D) $3.6 \times 10 ^ { - 3 }$ degrees