Optics principles. For example, the Ames room, Hering, Müller-Lyer, Orbison, Ponzo, Sander, and Wundt illusions all rely on the suggestion of the appearance of distance by using converging and diverging lines, in the same way that parallel light rays (or indeed any set of parallel lines) appear to converge at a vanishing point at infinity in two-dimensionally rendered images with artistic perspective. This suggestion is also responsible for the famous moon illusion where the moon, despite having essentially the same angular size, appears much larger near the horizon than it does at zenith. This illusion so confounded Ptolemy that he incorrectly
To the Point To the Point To the Point was an hour-long public affairs radio program co-produced by KCRW in Santa Monica, California and Public Radio International. The program originated at KCRW at 1 pm Pacific Time each weekday. Award-winning journalist Warren Olney hosts the show; it was syndicated nationwide by PRI and aired in 15 states and Washington, D.C. by Public Radio International. KCRW continues to podcast the program weekly (sometimes more frequently). The program begins with its theme music, a clip from John Coltrane's "A Love Supreme." Olney then introduces the topics for the day's program, followed by a break for