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Intense pulsed light (IPL) is a technology used by cosmetic and medical practitioners to perform various skin treatments for aesthetic and therapeutic purposes, including hair removal, photorejuvenation (e.g. the treatment of skin pigmentation, sun damage, and thread veins) as well as to alleviate dermatologic diseases such as acne.
An extremely intense pulse of short-wave UV light in a flashtube produced this blue persistent-phosphorescence in the amorphous, fused silica envelope, lasting as long as 20 minutes after the 3.5 microsecond flash. An electron microscope reveals vacancy defects in a crystalline lattice of molybdenum disulfide.
Name Image Year built Location & coordinates Class of Light [3] Focal height [3] NGA number [3] Admiralty number [3] Range nml [3]; Biển Sơn Lighthouse: Image: 1962: Nghi Sơn Thanh Hóa province
Extremely hot stars (such as O- and B-type) emit proportionally more UV radiation than the Sun. Sunlight in space at the top of Earth's atmosphere (see solar constant) is composed of about 50% infrared light, 40% visible light, and 10% ultraviolet light, for a total intensity of about 1400 W/m 2 in vacuum.
Common current ultrashort pulse laser technologies include Ti-sapphire lasers and dye lasers. High output peak power usually requires chirped pulse amplification of a seed pulse from a modelocked laser. Dealing with high optical powers also needs the nonlinear optical phenomena to be taken in account. [citation needed]
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By the end of the 1970s, artists Đinh Thìn and Ngo Nam modernized the sáo by making this 6-finger-hole flute into 10-finger-hole flute, extending its register. [1] Examples of the difference between the two variations of the flute can be heard in Đinh Thìn's "Tiếng gọi mùa xuân" and Mão Mèo's performance of "tình xưa nghĩa cũ".
Map of ancient Asia shows location of the Âu Việt state of Nam Cương and other Viet’s kingdoms. According to folklore, prior to Chinese domination of northern and north-central Vietnam, the region was ruled by a series of kingdoms called Văn Lang with a hierarchical government, headed by Lạc Kings ( Hùng Kings ), who were served by ...