๐ U+1F505 Unicodeๆๅญ
Unicode
U+1F505
๐
ๆฐๅคๆๅญๅ็ ง
🔅 🔅
URLใจใณใณใผใ(UTF-8)
%F0%9F%94%85
ใฆใใณใผใๅ
LOW BRIGHTNESS SYMBOL
ไธ่ฌใซใใดใช๏ผ
Symbol, Other๏ผ่จๅท๏ผใใฎไป๏ผ
ๆๅญๅใใใๅฏ่ฝๆงใฎใใๆๅญ
- UTF-16 : ้ฟฐ่
- Shift_JIS : ๏ฟฝๆฒ๏ฟฝ
- CP932 : ๎่ณ
- EUC-JP : ๏ฟฝ๏ฟฝ๏ฟฝ๏ฟฝ
Base64ใจใณใณใผใ : 8J+UhQ==
ใ๐ ใใซไผผใฆใใๆๅณใฎๆๅญ
๐ ใฎ่ชฌๆ
่ทจ่ช่จ
็ฌฆ่
๐
ไฝไบฎๅบฆ
ๅ่
Emojipediaไธ้ๆผ๐
็่ณๆ[ๅบๅ
ธ:Wiktionary]
Brightness is an attribute of visual perception in which a source appears to be radiating or reflecting light. In other words, brightness is the perception elicited by the luminance of a visual target. The perception is not linear to luminance, and relies on the context of the viewing environment (for example, see White's illusion).
Brightness 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
{\displaystyle Q}
. Brightness refers to how much light appears to shine from something. This is a different perception than lightness, which is how light something appears compared to a similarly lit white object.The adjective bright derives from an Old English beorht with the same meaning via metathesis giving Middle English briht. The word is from a Common Germanic *berhtaz, ultimately from a PIE root with a closely related meaning, *bhereg- "white, bright".
"Brightness" was formerly used as a synonym for the photometric term luminance and (incorrectly) for the radiometric term radiance. 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 is an antonym of "wikt:dimness" or "wikt:dullness".
With regard to stars, brightness is quantified as apparent magnitude and absolute magnitude.
The United States Federal Trade Commission (FTC) has assigned an unconventional meaning to brightness when applied to lamps. When appearing on light bulb packages, brightness means luminous flux, while in other contexts it means luminance. Luminous flux is the total amount of light coming from a source, such as a lighting device. Luminance, the original meaning of brightness, is the amount of light per solid angle coming from an area, such as the sky. The table below shows the standard ways of indicating the amount of light.[ๅบๅ
ธ:Wikipedia]
๐ ใฎๆๅญใไฝฟใฃใไพๆ
๐ ไบบ็ใซใฏใๅธธใซๆใใ้ขใจๆใ้ขใๅญๅจใใฆใใพใใใญใใใใฆใใใใใใฎ้ขใๆททๅจใใฆใใใใใใใ็งใใกใฏๆ้ทใใๅญฆใณใใใใฆ้ฒๅใใใใจใใงใใใฎใงใใๅ ใจ้ใใใใ2ใคใฏใ็ธๅใใ่ฆ็ด ใซ่ฆใใพใใใๅฎใฏๅฏๆฅใซ้ขไฟใใฆใใใจ่ใใใใพใใ ๐ ไบบ็ใฎ่ฆ้ฃใๆซๆใจใใฃใๆใ้ขใฏใๅคใใฎๅ ดๅใ็งใใกใๅๅผทใๆ้ทใใใพใใๅฐ้ฃใซ็ด้ขใใฆไนใ่ถใใๆๅใๆใซๅ ฅใใใใจใงใ็งใใกใฏ่ชไฟกใๅๆฐใๅพใพใใใใฎใใใช็ถๆณใฏใ็งใใกใๅคงใใซ้ใใใใจใใงใใพใใ ๐ ใใใใ้ๅบฆใซๆใ้ขใๆฏ้ ็ใซใชใฃใฆใใพใใจใไบบ็ใฎๆๅณใ็ฎ็ใ่ฆๅคฑใฃใฆใใพใใใจใใใใพใใใใฎใใใชๅ ดๅใ่ชๅใๅคขไธญใซใชใใใใจใ่ฆใคใใๅ้ฒใใใใจใ้่ฆใงใใๅฅใใใช็ฒพ็ฅ็ถๆ ใไฟใกใๅ ใ่ฆใคใใใใจใๅฟ ่ฆใงใใ ๐ ไธๆนใงใๆใใ้ขใๅใใใจใ่จใใพใใๅนธ้ใๆๅใฏ็ด ๆดใใใใใฎใงใใใ้ท็ถใใใชใใใจใใใใพใใๆใใ้ขใๆฏ้ ็ใซใชใใจใ็งใใกใฏ็ก็บใซๅฎๅฟใใๆบ่ถณๆใใๆ้ทใฎๆฉไผใ่ฆ่ฝใจใใใจใซใชใใพใใ ๐ ใใฎใใใซใไบบ็ใซใใใๅ ใจ้ใฏใไบใใๅฟ ่ฆใจใใฆๅญๅจใใใใฎใ ใจ่จใใพใใๆใใ้ขใงใฎๆๅใฏใ็งใใกใซๅใณใ่ชไฟกใไธใใๆใ้ขใฏ็งใใกใๆ้ทใใใใ็พๅฎใฏๅธธใซไธกๆนใใใใใฎใงใใใใฉใกใใๆ่ญใใใใซใใฃใฆใใ็งใใกใๅใ้ใ็ใๆนใๆฑบใพใฃใฆใใพใใพใใ ๐ ๅคงๅใชใฎใฏใ่ชๅ่ช่บซใใฉใฎๅด้ขใซ็ฆ็นใๅฝใฆใใฉใฎใใใซ่ใใใใซใใใพใใไธก้ขใใใใจใใใใจใฏใๅฐ้ฃใซ็ด้ขใใใจใใงใใใใใๅ ๆใใใพใๆๅใใฆใใไบบ้ๆงใๆ้ทใฎๅใณใๆใใใใจใใงใใใจใใใใจใๅ ใ้ใใ้ฟใใใๆๅฆใใใฎใงใฏใชใใใใฉใณในใไฟใกใไบบ็ใๅ้ฒใใใพใใใใ(ใใฎไพๆใฏAIใซใใไฝๆใใใฆใใพใใ็นๅฎใฎๆๅญใๅซใๆ็ซ ใๅบๅใใฆใใพใใๅ ๅฎนใๆญฃ็ขบใงใชใๅ ดๅใใใใพใใ)