In a Double Slit Experiment, the Intensity of Light at the Center

Multiple Choice

In a double slit experiment, the intensity of light at the center of the central bright fringe is measured to be 6.2 µW/m². What is the intensity halfway between the center of this fringe and the first dark band, assuming that the small-angle approximation is valid?

A) 6.2 µW/m²
B) 3.1 µW/m²
C) 4.7 µW/m²
D) 1.6 µW/m²
E) 0.12 µW/m²