Longquan celadon ( 龍泉青磁 ) refers to Chinese celadon produced in Longquan ( 龍泉 ) kilns which were largely located in Lishui prefecture in southwestern Zhejiang Province.

Timber, waterpower, mineral deposit and wilderness are four major natural resources of Lishui prefecture that rank first in Zhejiang province.

In the recent years, Lishui prefecture has seen a rapid development in industry.

The Tenth Army ( Imperial Japanese Army ) was ordered to move the 114th and 6th divisions along Liyang-Lishui Highway and Guangde-Honglanbu Highway on December 3 for the Lishui area, with two additional contingents to penetrate westward to Wuhu and Dangtu for Anhui Province segment of the Yangtze River.

An example of this is Zaicheng Town in Lishui County, both Jianghuai and Wu dialect were spoken in several towns in Lishui, with Wu being spoken by the greater amount of people in more towns than Jianghuai.

Lishui is situated in the southwest of Zhejiang province, with its administrative area covering latitude 27 ° 25 ' to 28 ° 57 ' N and longitude 118 ° 41 ' to 120 ° 26 ' E. It borders the cities of Ningde and Nanping ( Fujian province ) to the southwest as well as Quzhou to the northwest, Jinhua to the north, Taizhou to the northeast, and Wenzhou to the southeast.

Lishui has a monsoon-influenced humid subtropical climate ( Köppen Cfa ), with short, mild winters ( with occasional frost ), and long, hot, humid summers ; the average high temperature in July is.

Separately, the 114th Division, followed by the 6th Division, burst through the cordon lines of the Chinese 88th Division and 74th Corps and took over Lishui and Molingguan by December 4, and pushed to the area of Lulangzhen and Jiangningzhen.

The Xiang, the Zi, the Yuan and the Lishui Rivers converge on the Yangtze River at Lake Dongting in the north of Hunan.

* Lishui River ( 澧水 ), in Hunan, China, one of the Yangtze River's four largest tributaries in the province.

Lishui River ( also known as Li River, Chinese language: 澧水, pinyin: lǐshuǐ, Wade-Giles: li < sup > 3 </ sup >- shui < sup > 3 </ sup >) is a river in Hunan province of China, one of the Yangtze River's four largest tributaries in the province.

Lishui has three origination places, the north, the middle and the south.

The four largest rivers in Hunan are: the Xiang River, the Yuan Jiang, the Zijiang River and the Lishui River.

Lishui () is a prefecture-level city in the southwest of Zhejiang province, People's Republic of China.

Lishui has a very long history, for during the Liangzhu Culture period 4000 years ago, there were tribes living in the area.

In 779, during the Tang Dynasty, it was renamed Lishui County.

The name of the area was maintained as Chuzhou Fu until the Ming and Qing Dynasties when it was changed back to Lishui.

In the year 1935, the area was given the official name: Lishui Administrative Supervision District.

In 1949, the Lishui Special District was established but then abolished in 1952.

Later, it was re-instated in 1963 and the area was renamed as Lishui City.

By the year 1997, Longquan, Qingtian, Jinyun, Yunhe, Qingyuan, Suichang, Songyang and Jingning were under the jurisdiction of Lishui, Liandu District serving as the administrative headquarters.

The prefecture-level city of Lishui currently administers one district, one county-level city, six counties and one autonomous county.

The highest mountain in the province, Huangmaojian Peak, is high and located near Lishui.

Lishui City covers approximately, among which 88. 42 % is mountainous.

Advances in design of diode lasers and optical parametric oscillators promote developments in fluorescence and ionization spectrometry and also in absorption techniques where uses of optical cavities for increased effective absorption pathlength are expected to expand.

It also has chemical and optical uses as mineral specimens in toothpastes, for example.

Therefore, four loose families of more-efficient light transport modelling techniques have emerged: rasterization, including scanline rendering, geometrically projects objects in the scene to an image plane, without advanced optical effects ; ray casting considers the scene as observed from a specific point-of-view, calculating the observed image based only on geometry and very basic optical laws of reflection intensity, and perhaps using Monte Carlo techniques to reduce artifacts ; and ray tracing is similar to ray casting, but employs more advanced optical simulation, and usually uses Monte Carlo techniques to obtain more realistic results at a speed that is often orders of magnitude slower.

* Geordi La Forge from Star Trek: The Next Generation, who was born blind and uses optical implants combined with a removable unit called a VISOR, to see.

Erbium's principal uses involve its pink-colored Er < sup > 3 +</ sup > ions, which have optical fluorescent properties particularly useful in certain laser applications.

The advantages of optical keyboard technology are that it offers a real waterproof keyboard, resilient to dust and liquids ; and it uses about 20 % PCB volume, compared with membrane or dome switch keyboards, significantly reducing electronic waste.

The specialist Datahand keyboard uses optical technology to sense keypresses with a single light beam and sensor per key.

The most common type of laser uses feedback from an optical cavity — a pair of mirrors on either end of the gain medium.

To derive a course to steer relative to the sun direction, he uses a sun-stone ( Solarsteinn ) made of Iceland spar ( optical calcite or Silfurberg ), and a " horizon-board.

An optical microdisk, optical microtoroid, or optical microsphere uses internal reflection in a circular geometry to hold onto the photons.

There are many types of microscopes, the most common and first to be invented is the optical microscope which uses light to image the sample.

The transmission electron microscope works on the same principle as an optical microscope but uses electrons in the place of light and electromagnets in the place of glass lenses.

Other uses include diaphragms for oxygen-breathing equipment, marker dials for navigation compasses, optical filters, pyrometers, thermal regulators, stove and kerosene heater windows, and micathermic heater elements.

End uses of optical brighteners include:

Research and prototyping processes often use contact or proximity lithography, because it uses inexpensive hardware and can achieve high optical resolution.

A Mini-mouse is a small egg-sized mouse for use with laptop computers ; usually small enough for use on a free area of the laptop body itself, it is typically optical, includes a retractable cord and uses a USB port to save battery life.

* Laser spectroscopy uses tunable lasers and other types of coherent emission sources, such as optical parametric oscillators, for selective excitation of atomic or molecular species.

These include photon scanning microscopy ( PSTM ), which uses an optical tip to tunnel photons ; scanning tunneling potentiometry ( STP ), which measures electric potential across a surface ; spin polarized scanning tunneling microscopy ( SPSTM ), which uses a ferromagnetic tip to tunnel spin-polarized electrons into a magnetic sample, and atomic force microscopy ( AFM ), in which the force caused by interaction between the tip and sample is measured.

* Sir Isaac Newton uses a prism to split sunlight into its component colors, which helps us understand the nature of light more comprehensively ( see optical spectrum ).