Light and Dark

With more than 100 diagrams, graphs, and figures, the subjects discussed include the history of artificial lighting, eclipse cycles, glasses that go dark in sunlight, rainbows, chiaroscuro art, bioluminescence, the clock setting at the South Pole, zebra stripe patterns, lighthouses, color perception, the harvest moon, and how information and speech can be conveyed by light from the sun or from a laser. The book examines many familiar phenomena, such as the variations in the duration of twilight through the year and the ability of human vision to misinterpret patterns of lines under certain conditions.

Zusammenfassung
An entertaining, instructive, diverse, and unusual book, Light and Dark: An Exploration in Science, Nature, Art and Technology encompasses a wide range of topics not normally found in one book.With more than 100 diagrams, graphs, and figures, the subjects discussed include the history of artificial lighting, eclipse cycles, light-sensitive eyeg

Inhalt
PREFACE 1 ESSENTIAL, USEFUL AND FRIVOLOUS LIGHT 1.1 Light for life 1.2 Wonder and worship 1.3 Artificial illumination 1.4 Light in art and entertainment 2 PATTERNS OF SUNLIGHT 2.1 The year 2.2 Equinoxes and eccentricity 2.3 The length of a day 2.4 The length of daylight 2.5 The length of a second 3 MONTHS AND MOONLIGHT 3.1 The lunar month and the lunar orbit 3.2 The lunar nodes and their rotation 3.3 The lunar day 3.4 The length of moonlight 3.5 Eclipses and Saros cycles 3.6 Tides 4 HISTORY, DATES AND TIMES 4.1 Solar calendars 4.2 The Roman Catholic Church and the development of astronomy 4.3 The start of the year 4.4 Lunar and other calendars 4.5 Time zones 4.6 The International Date Line 5 LIGHT AND THE ATMOSPHERE 5.1 Scattered light and twilight 5.2 Polarization of light 5.3 Rainbows 5.4 Cloudy skies 5.5 Halos 6 SEEING THE LIGHT 6.1 The human eye 6.2 Colour vision and colour blindness 6.3 Polarization sensitivity 6.4 Speed of response 6.5 Optical illusions 7 ZOOLOGICAL DIVERSIONS 7.1 Colour vision in animals 7.2 Zebras 7.3 Piebald coats and unusual goats 7.4 Jellicle cats are black and white 7.5 Cephalopods 17.6 Lighting up for a mate or a meal 7.7 More anatomical oddities 8 INFORMATION IN LIGHT 8.1 Lighthouses 8.2 Semaphores for optical telegraphy 8.3 Morse, Mance and the heliograph 8.4 Bell and the photophone 9 LIGHT IN THE ERA OF ELECTRONICS 9.1 Electronics 1900-1960 9.2 New semiconductors for optoelectronics 9.3 Optoelectronic semiconductor devices 9.4 Bright light from cool solids 10 OPTICAL COMMUNICATION TODAY 10.1 Waveguides and optical fibres 10.2 The transparency of glass 110.3 Optical fibres 10.4 Optical amplification 10.5 Conveying sound by light 10.6 The long and the short of optical communication

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