(光度学)
光度测量
the scientific measurement of light in terms of its intensity, color, and other properties
Photometry is the science of measuring the intensity of light. It involves determining how much light is emitted, reflected, or transmitted by an object or source. This process is important in various fields, including photography, astronomy, and lighting design, to ensure accurate lighting conditions and quality. Photometry helps in evaluating how bright a light source is and how it will appear in different settings.
(高程仪)
高度计
an instrument used to measure and indicate the altitude of an object above a fixed level, typically the Earth's surface
(风向计)
风速计
a device used to measure the speed and direction of the wind
(安培数)
安培
the unit of electric current, symbolized as "A" in the International System of Units (SI)
(气压仪)
气压计
a scientific instrument used to measure air pressure
(开)
克拉
a unit to measure the purity of gold, the purest gold being 24 karats
A karat is a unit of measurement used to denote the purity of gold, with one karat being equal to 1/24th of the whole. Therefore, 24-karat gold is considered to be pure gold. The higher the karat number, the higher the percentage of gold in the item. For example, 18-karat gold contains 75% gold, while 14-karat gold contains 58.3% gold. Karat is also used as a term to describe the weight of gemstones, with one karat equal to 0.2 grams. The term "carat" is sometimes used interchangeably with "karat," but carat is generally used to describe the weight of diamonds and other gemstones, while karat is used to describe the purity of gold.
(周界)
周长
the total length of the external boundary of something
(高程测量)
地形测量
the measurement of land elevation variations comparing to sea level or a chosen reference point
(水文计算)
水文测量
the measurement and analysis of water flow, levels, and properties in natural bodies of water and hydraulic systems
(光谱分析)
光谱测量
the measurement and analysis of the spectrum of electromagnetic radiation emitted or absorbed by substances
(伏特计)
电压表
a device used to measure the electric potential difference between two points in an electrical circuit
(测压仪)
压力计
a device used to measure the pressure of gases or liquids in a closed system, typically by comparing it to atmospheric pressure
(温差电偶)
热电偶
a temperature sensor that generates electricity based on heat
(测量学)
计量学
the scientific study of measurement, including the development of measurement standards and techniques
(热量计量)
热量测定法
the scientific measurement of heat exchange in chemical or physical processes
(引力测量)
重力测量
the measurement of variations in gravitational fields to understand the Earth's structure and properties
(亮度单位)
光度单位
a measure of the brightness of a light source as perceived by the human eye
语法信息:
(密度测定法)
密度测量法
the process of measuring how dense something is by assessing how much light it absorbs or transmits
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