الموجة الضوئية السائدة .. كتاب التصوير الملون ، الكاتب عبد الفتاح رياض

Dominant wavelength

If we look at Figure 26, we will find that it is possible to synthesize the white color by mixing a certain quantity of the color represented by point N with another quantity of the light wavelength of 5400 angstroms.

It is also possible to combine the color represented by the point (L) by mixing a certain amount of white color (Z) with a certain amount of color with a light wavelength of 5200 angstroms. Therefore, this light wave is called the Dominant Wavelength in relation to the color (L). If it is mixed with a certain amount of white, the color (L) can be combined.

It is also possible to install the color represented by point (N) by mixing a certain amount of white (Z) with another amount of scarlet color represented by point (M) located on the scarlet line. Here, the point (m) becomes specific to the location of the prevailing light wave also in relation to color (n), because if the metamorphic color is mixed with color (m), then color (n) will be formed.

And since all light wavelengths are represented on the graph, starting from 3900 angstroms, and rotating with the curve until they reach 7000 angstroms, therefore, a distinction is made between the wavelengths of light on the purple line and the lengths of those light waves on the graph, by placing a negative sign ( -) in front of the value of the light wavelengths that represent the colors (purples or magenta) located on the scarlet line. The colors located on that line are numbered with the same numbers of the corresponding prevailing light wavelengths on the other side on the Chromaticity Diagram.

Dominant wave iength

The prevailing light wave for any color is that which, if mixed with some amount of white, would be possible to synthesize this color, for example:

For color: (200 angstroms) is considered to be the prevailing light wavelength. If the color is a result of mixing white with purple or magenta, then the number denoting the prevailing light wavelength must be preceded by a sign ( ) because all the colors located on The crimson line is, in fact, colors that do not exist in the visible spectrum.From the figure, we conclude that the dominant light wave for color n: is (-5400 angstrom), since if we extended the line connecting n, it would correspond to the color curve graphic at the point that represents the light wave whose length is (5400 angstrom)