Before revision: The angular radius of the Airy disk (measured from the center to the first null) is given by: || || || rowspan=4 | where θ is the angular resolution in radians, λ is the wavelength of light in meters, and D is the diameter of the lens aperture in meters.
After revision: The angular radius of the Airy disk (measured from the center to the first null) is given by: where θ is the angular resolution in radians, λ is the wavelength of light in meters, and D is the diameter of the lens aperture in meters.