Perceived visual angle feet away, so it subtends a visual angle of 14 degrees. It can be said that the house "looks larger and farther away" than the window, meaning that the perceived linear size "S′" for the house's width is much larger than "S′" for the window; for instance a person might say the house "looks about 40 feet wide" and the window "looks about 3 feet wide." One can also say that the house "looks smaller and farther away" than the window, and that does not contradict the other statement because now we mean that the amount ("θ′") by which directions
Six degrees of separation We should select any person from the 1.5 billion inhabitants of the Earth – anyone, anywhere at all. He bet us that, using no more than "five" individuals, one of whom is a personal acquaintance, he could contact the selected individual using nothing except the network of personal acquaintances. This idea both directly and indirectly influenced a great deal of early thought on social networks. Karinthy has been regarded as the originator of the notion of six degrees of separation. A related theory deals with the quality of connections, rather than their existence. The theory of three degrees of influence