modulated light beam
31Anti-frogman techniques — are security methods developed to protect watercraft, ports and installations, and other sensitive resources both in or nearby vulnerable waterways from potential threats or intrusions by frogmen or other divers.Risks and threats to be defended… …
32Optical transfection — is the process of introducing nucleic acids into cells using light. Typically, a laser is focussed to a diffraction limited spot ( 1 µm diameter) using a high numerical aperture microscope objective. The plasma membrane of a cell is then… …
33Gires-Tournois etalon — In optics, a Gires Tournois etalon is a transparent plate with two reflecting surfaces, one of which has very high reflectivity. Due to multiple beam interference, light incident on the lower reflectivity surface of a Gires Tournois etalon is… …
34Scophony — was a sophisticated mechanical television system developed in Britain by Scophony Limited, which used mirrors mounted on high speed rotating drums to project an image upon a screen. The company Scophony Limited was established by entrepreneur… …
35geodimeter — /dʒioʊˈdɪmətə/ (say jeeoh dimuhtuh) noun an instrument used in surveying which measures distance by calculating the change in phase in a beam of modulated light as it returns to its source. {trademark} …
36radio — /ray dee oh /, n., pl. radios, adj., v., radioed, radioing. n. 1. wireless telegraphy or telephony: speeches broadcast by radio. 2. an apparatus for receiving or transmitting radio broadcasts. 3. a message transmitted by radio. adj. 4. pertaining …
37spectroscopy — spectroscopist /spek tros keuh pist/, n. /spek tros keuh pee, spek treuh skoh pee/, n. the science that deals with the use of the spectroscope and with spectrum analysis. [1865 70; SPECTRO + SCOPY] * * * Branch of analysis devoted to identifying… …
38particle accelerator — accelerator (def. 7). [1945 50] * * * Device that accelerates a beam of fast moving, electrically charged atoms (ions) or subatomic particles. Accelerators are used to study the structure of atomic nuclei (see atom) and the nature of subatomic… …
39History of radar — The history of radar starts with experiments by Heinrich Hertz in the late 19th century that showed that radio waves were reflected by metallic objects. This possibility was suggested in James Clerk Maxwell s seminal work on electromagnetism.… …
40arts, East Asian — Introduction music and visual and performing arts of China, Korea, and Japan. The literatures of these countries are covered in the articles Chinese literature, Korean literature, and Japanese literature. Some studies of East Asia… …
