Like every waves, lumination carries energy. The part of the optical technologies, which are considered energetic characteristics of light in its broadcasting, distribution and conversation with a element called Photometry.
1 . Circulation of light strength - strength transmitted by using a surface per unit period. For example , the pupil with the eye cup window. If a body absorbs light dropped on it, the internal strength increases, and therefore its temp increases. By simply changing temperatrata judge the flow of light energy. The system of luminous flux of energy is L / h - W.
2 . Photometric magnitudes
a) flux - Р¤
Р¤ = K(О»). Р¤(E)
The work flow of light energy which has a wavelength benefit and the spectral sensitivity in the eye just for this length О» = 5iphon scam mm (green light). To produce the same discomfort, the circulation of crimson light with О» sama dengan 650 nm should be almost 10 times more than the circulation of ok. This means that the sensitivity with the eye to green light is definitely 10 times more than the sensitivity to crimson. In light beneath 400 nm and previously mentioned 780 nm sensitivity from the eye is definitely 0. The flow of sunshine energy dunes outside the noticeable area could possibly be different than 0, but the lumination output of those is always zero.
b) luminance - Electronic
E sama dengan F / S
The brightness of the surface prosht S is named luminous debordement F that falls on a unit part of вЂ‹вЂ‹surface. The human eye cannot determine with precision Are definitely the brightness of two nearby surfaces - visual assessment. The brightness can be assessed with finely-detailed devices known as luksmetri.
In light of the photosensitive layer EDN occurs between electrodes that is proportional for the brightness (EDN ~ E).
c) the intensity of sunshine - I actually
I = E as well as S. capital t J as well as s. m в‹„ Watts / meters
I sama dengan О”Р¤ as well as О”О© О”О©-solid angle
О”О© = О”S/R2 = sr / steradian
О”О© = 4P. R2/R2 = 4p sr (the whole sound angle)
The intensity is characteristic of the light sources. The intensity of the light source in a particular direction is known as luminous flux emitted with this direction in the unit sturdy...
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