Keywords: FWHMofAiryDisk.png en A graph of the Airy pattern on the interval <math>k a sin theta -10 10</math> <math>I theta I_0 left frac 2 J_1 k a sin theta k a sin theta right 2</math> k is the wavenumber in m <sup> ˆ’1</sup> a is the radius of the aperture is the angle of observation I<sub>0</sub> is the maximum intensity J<sub>1</sub> is the order one Bessel function of the first kind Airy_Pattern svg 50 2012-11-08 20 49 UTC Airy_Pattern svg Inductiveload derivative work Dietzel65 Addition of full width half maximum blue bar dietzel65 Airy_Pattern svg Airy disks |