|
North Foreland
North Foreland is a chalk headland on the Kent coast of southeast England, specifically in Broadstairs. With the rest of Broadstairs and part of Ramsgate it is the eastern side of Kent's largest peninsula, the Isle of Thanet. It presents a bold cliff to the sea, and commands views over the southern North Sea. Lighthouse Early history There was probably some sort of a beacon at an earlier period but the first distinct intimation concerning a lighthouse on the North Foreland is in the year 1636 when Charles I by letters-patent granted to Sir John Meldrum licence to continue and renew the lighthouses erected on the North and South Forelands. It seems that the lighthouse erected by Sir John consisted merely of a house built with timber lath and plaster on the top of which a light was kept in a large glass lantern for the purpose of directing ships in their course. This house was burnt down by accident in the year 1683 after which for some years use was made of a sort of beaco ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Isle Of Thanet
The Isle of Thanet () is a peninsula forming the easternmost part of Kent, England. While in the past it was separated from the mainland by the Wantsum Channel, it is no longer an island. Archaeological remains testify to its settlement in ancient times. Today, it is a tourist destination, and has an active agricultural base. Etymology The island of Thanet is mentioned as ''Tonetic'' (c. AD 150; the TON- of this form was misread as TOΛI-, hence it appears as ''Toliatis'' in the surviving manuscripts of Ptolemy); ''Tanat's'' (3rd C AD, Solinus); ''Tanatos'' (AD 731); ''Tenid'' in 679BEAUREPAIRE and ''Tenet'' (e.g. charters of AD 679, 689 and thereafter); and the Old Welsh forms ''Tanet'' and ''Danet'', found in the ''Historia Brittonum'' (c. AD 829/30) and Armes Prydein (c. AD 930). Standard reference works for English place-names (such as Eilert Ekwall's ''Concise Oxford Dictionary of English Place-Names'') state the name ''Tanet'' is known to be Brythonic in origin. Common ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Convex Lenses
A lens is a transmissive optical device which focuses or disperses a light beam by means of refraction. A simple lens consists of a single piece of transparent material, while a compound lens consists of several simple lenses (''elements''), usually arranged along a common axis. Lenses are made from materials such as glass or plastic, and are ground and polished or molded to a desired shape. A lens can focus light to form an image, unlike a prism, which refracts light without focusing. Devices that similarly focus or disperse waves and radiation other than visible light are also called lenses, such as microwave lenses, electron lenses, acoustic lenses, or explosive lenses. Lenses are used in various imaging devices like telescopes, binoculars and cameras. They are also used as visual aids in glasses to correct defects of vision such as myopia and hypermetropia. History The word ''lens'' comes from '' lēns'', the Latin name of the lentil (a seed of a lentil plant), bec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
