Maxwell's triangle

Maxwell's color tops. James Clerk Maxwell with his first design of colour top, 1850s. Original at Trinity College, Cambridge.

6 flashcards · Physics · by lakesare

1. This is Maxwell's color top structure:

   This is Maxwell's triangle:

2. Where is white? Maxwell triangle

   White (‘equal-energy white’) is at point E.

3. What is dashed line? Maxwell triangle

   Mixture line, and indicates the positions of the colours in this diagram producable by mixing red and cyan light together.

4. What is the name for the set of points that lie within or on the edge of this triangle? Maxwell triangle

   Gamut Almost all candidates could explain that the name for the set of points circumscribed by the triangle is the gamut, and that this is the set of colours that are expressible by all possible mixtures of these primaries.

5. The figure below shows a Maxwell's triangle representing the color space of red, green, and blue primaries. What is point R? What is point E? What's the name for the set of points that lie within or on the edge of this triangle?

   R is red E is white Gamut of colours expressible by all possible mixtures of these primaries. The gamut of colours expressible by all possible mixtures of these primaries lies within or on the edge of the triangle Part (g) was also generally well answered. Most candidates knew that point R represents red. However not all candidates knew that E represents white, and is the point of equal energy. Almost all candidates could explain that the name for the set of points circumscribed by the triangle…

6. What's NOT represented on Maxwell's triangle?

   Brightness. The chromaticity that is represented in Maxwell’s triangle is the qualitative aspect of psychophysical colour; the quantity of that colour – corresponding to brightness or luminance – is not represented.