Figure CQ22.12

The Rayleigh criterion provides a convenient way to describe the theoretical resolution (e.g. an ability to distinguish objects ) of an optical system. The criterion states that two small bright sources of light can be resolved if the first d mìnimum of the image of one source point just coincides with of further apart then the first maximum of another (s Ho Your c below). A converging lens, 28.7 mm in diameter, is used to form images of distant objects. Considering the diffractio lens, what angular separation must two distant point objects have in order to satisfy Rayleigh's criterion? Assume t Here wavelength of the light from the distant objects is 469 nm. Provide your answer in millidegrees (mdeg). STE Exp complexity subscibers Answer: Choose... + Check Finishin Check c

Figure P22.26 shows a lightray incident on a seriesof slabs having differentrefractive indices, wheren 1 < n 2 < n 3 < n 4. Noticethat the path of the raysteadily bends toward thenormal. If the variationin n were continuous, thepath would form a smoothcurve. Use this idea and a ray diagram to explain why you cansee the Sun at sunset after it has fallen below the horizon.

Impressionist painter Georges Seurat created paintings with an enormous number of dots of pure pigment, each of which was approximately 2.00 mm in diameter. The idea was to have colors such as red and green next to each other to form a scintillating canvas, such as in his masterpiece, A Sunday Afternoon on the Island of La Grande Jatte (figure below). Assume 1 = 420 nm and a pupil diameter of 4.90 mm. Beyond what distance would a viewer be unable to discern individual dots on the canvas? m SuperStock/SuperStock