Xerography or electrophotography is a dry photocopying technique. Its fundamental principle was invented by Hungarian physicist PÃ¡l SelÃ©nyi and based on SelÃ©nyi's publications Chester Carlson applied for and was awarded U.S. Patent 2,297,691 on October 6, 1942. The technique was originally called electrophotography.
A retrospective, generally, is a look back at events that took place, or works that were produced, in the past. As a noun, retrospective has specific meanings in medicine, software development, popular culture and the arts. It is applied as an adjective, synonymous with the term retroactive, to laws, standards, and awards.
Retrospect (à¤à¥à¤°à¤¸à¥à¤ªà¥à¤à¥à¤) meaning in Hindi (English to Hindi meaning) à¤¬à¥à¤¤à¥ à¤¬à¤¾à¤¤à¥à¤ à¤à¥ à¤à¤¾à¤à¤; Retrospect Origin. early 17th century: from retro- âbackâ, on the pattern of the noun prospect. Retrospect in a sentence (word usage in recent Hindu newspaper)