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This page was last edited on 18 November 2013, at 15:41 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.
AFAIK, optical density was originally defined by Hurter and Driffield as D = log10(O) to indicate the amount of an opaque substance suspended in a transparent medium: "For our purposes, i.e., in its application to negatives, the density is directly proportional to the amount of silver deposited per unit area, and may be used as a measure of ...
τ ν is the spectral optical depth in frequency, and; τ λ is the spectral optical depth in wavelength. Although absorbance is properly unitless, it is sometimes reported in "absorbance units", or AU. Many people, including scientific researchers, wrongly state the results from absorbance measurement experiments in terms of these made-up ...
North Central Coast (Bắc Trung Bộ) Hà Tĩnh Nghệ An Quảng Bình Quảng Trị Thanh Hóa Huế † 51,242.75 11,190,830 218.39 contains the coastal provinces in the northern half of Vietnam's narrow central part. They all stretch from the coast in the east to Laos in the west. South Central Coast (Duyên hải Nam Trung Bộ) Bình Định
Tam Cốc – Bích Động is a popular tourist destination in north Vietnam and part of the Tràng An Scenic Landscape Complex UNESCO World Heritage site. [1] It is located in Ninh Binh province , near the village of Tam Cốc.
The region's second international airport at Cam Ranh (serving Nha Trang flights to various cities in Vietnam, Guangzhou, Shanghais, Hong Kong, etc.). Phu Cat Airport (serving Quy Nhon) and Dong Tac Airport (serving Tuy Hòa) have only domestic flights. Chu Lai in southern Quảng Nam province has an international airport, but only domestic ...
Phạm Hùng, Secretary of the Central Office of South Vietnam (COSVN), outlined the requirements about the ordered anthem: [1] [2] The anthem's targets were all of the population of South Vietnam. The anthem had to call for the armed insurrection against the US-backed Saigon regime and the unification of Vietnam as a whole.
The Ministry of Natural Resources and Environment (MONRE, Vietnamese: Bộ Tài nguyên và Môi trường) is a government ministry in Vietnam responsible for: land, water resources; mineral resources, geology; environment; hydrometeorology; climate change; surveying and mapping; management of the islands and the sea.