The Lick Observatory has one of the largest refracting telescopes, with an aperture diamet...

The Lick Observatory has one of the largest refracting telescopes, with an aperture diameter of 36 in. and a focal length of 56 ft. Determine the radii of the first and second bright rings surrounding the Airy disc in the diffraction pattern formed by a star on the focal plane of the objective. See Figure 11-8b.

Figure 1.