Light Show! Part 2 following Wannabe6mt pics.
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Joined: Apr 2007
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From: Boston, Mass
well i see just fine.....like i said it was taken from a camera phone so pics are not gonna come out perfect, everybody likes sumptin others don't and most like to look the same as the others and not be different,
Photometry and Colorimetry
Photometry is a branch of spectroscopy that measures light, scaled to the visual response of the human eye. Radiometric units define the absolute amount of light present and photometric units define the total amount of light as perceived by the human eye.
Photopic Response
The eye is most sensitive to light in the yellow and green area of the spectrum, specifically 555 nm, and is least sensitive in the blue and red regions of the spectrum. This response is known as the photopic response. The scotopic response is the response of human dark-adapted vision to light. (See figure 1.)
Figure 1. Photopic and scotopic response of the human eye.
Therefore, in order to convert a radiometric measurement into a photometric value it is necessary to correct the spectrum by the photopic curve and multiply the result by 683. The total light output from a light source is called the total radiant flux and is measured in Watts.
Photometry is a branch of spectroscopy that measures light, scaled to the visual response of the human eye. Radiometric units define the absolute amount of light present and photometric units define the total amount of light as perceived by the human eye.
Photopic Response
The eye is most sensitive to light in the yellow and green area of the spectrum, specifically 555 nm, and is least sensitive in the blue and red regions of the spectrum. This response is known as the photopic response. The scotopic response is the response of human dark-adapted vision to light. (See figure 1.)
Figure 1. Photopic and scotopic response of the human eye.
Therefore, in order to convert a radiometric measurement into a photometric value it is necessary to correct the spectrum by the photopic curve and multiply the result by 683. The total light output from a light source is called the total radiant flux and is measured in Watts.