#Define brightness Pc
#Define brightness windows

Unlike the ridiculous hypothetical birthday cake, a Toughbook probably won't burn your house down. That's about how bright the latest Toughbook displays can get. The effect or sensation by means of which an observer is able to distinguish differences in luminance. Take a birthday cake measuring one square meter and stick six thousand lit candles in it. Though the terminology has been updated, it is still a measurement of the approximate amount of light emitted from a 19th century whale oil candle. One candela is, for all intents and purposes, the same thing as one candlepower. As it turns out, physicists and engineers have slang, and they derive it from Latin. Information and translations of brightness in the most comprehensive dictionary definitions resource on the web. 'Nit' - probably derived from the Latin nitere, to shine - is a widely accepted slang term for candela per square meter, cd/m². Definition of brightness in the dictionary. You won't have that problem with your Toughbook H2. It can be hard to read your smartphone outside on a sunny day. Higher nit screens are easier to view in a broader range of lighting conditions. The latest models of the Toughbook CF-19 and the Toughbook H2 reach up to 6000 nits in direct sunlight due to 'TransflectivePlus' and Panasonic CircuLumin display technologies. giant star, any star having a relatively large radius for its mass and temperature because the radiating area is correspondingly large, the brightness of such stars is high. The best consumer laptops on the market right now reach about 300 nits. Luminous Flux is how much visible light is emitted by a light source or received by a surface. The more nits, theīrighter more luminescent the screen. Lumen definition is: a unit of luminous flux in the International System of Units (SI), that is equal to the amount of light given out through a solid angle by a source of one candela intensity radiating equally in all directions. Brightness is nonlinear and subjective, so it can't be measured. 'Luminance' refers to the intensity of light, an objective property of nature. Actually, it's technically a measure of luminance. The candela per square metre is sometimes called the nit.The nit is a unit of measurement for brightness. In labelling, brightness is a measure of the amount of light reflected by a material (usually paper) in particular, it refers to the perception of an object. Luminous flux per unit solid angle per unit projected source area. The lumen second is sometimes called the talbot. The table below shows the standard ways of indicating the amount of light. Luminance, the original meaning of brightness, is the amount of light per solid angle coming from an area, such as the sky. Luminous flux is the total amount of light coming from a source, such as a lighting device. When appearing on light bulb packages, brightness means luminous flux, while in other contexts it means luminance. The United States Federal Trade Commission (FTC) has assigned an unconventional meaning to brightness when applied to lamps. With regard to stars, brightness is quantified as apparent magnitude and absolute magnitude. īrightness is an antonym of ' wikt:dimness' or ' wikt:dullness'. As defined by the US Federal Glossary of Telecommunication Terms ( FS-1037C), 'brightness' should now be used only for non-quantitative references to physiological sensations and perceptions of light.

'Brightness' was formerly used as a synonym for the photometric term luminance and (incorrectly) for the radiometric term radiance.

#Define brightness Pc

To find out if your PC supports this, select Settings > System.

#Define brightness windows

(If the slider isnt there, see the Notes section below.) Some PCs can let Windows automatically adjust screen brightness based on the current lighting conditions. The word is from a Common Germanic * berhtaz, ultimately from a PIE root with a closely related meaning, * bhereg- 'white, bright'. Select the Network icon on the right side of the taskbar, and then move the Brightness slider to adjust the brightness. The adjective bright derives from an Old English beorht with the same meaning via metathesis giving Middle English briht. This is a different perception than lightness, which is how light something appears compared to a similarly lit white object. Brightness refers to how much light appears to shine from something. The perception is not linear to luminance, and relies on the context of the viewing environment (for example, see White's illusion).īrightness is a subjective sensation of an object being observed and one of the color appearance parameters of many color appearance models, typically denoted as Q. In other words, brightness is the perception elicited by the luminance of a visual target. synonyms: brightness level, light, luminance, luminosity, luminousness noun. Decreasing brightness with depth (underwater photo as example)īrightness is an attribute of visual perception in which a source appears to be radiating or reflecting light. the quality of being luminous emitting or reflecting light.