1. Assume that you are working on your Apple laptop, which has a color gamut defined by the three primaries of 650, 530, and 460 nm. However, your project is to be displayed using a Panasonic projector, which uses a different set of three primaries, e.g., 700, 546.1 and 435 nm. It is certainly possible to duplicate Grassman's experiments and determine the conversion from one set of primary lights to another but this is difficult, laborious, and very time consuming. Describe what you should do to best project your work in class in order to maintain the exquisite color design that you have constructed on your laptop. (You do not have to specify the exact numerical procedures.)

2. We now understand how to predict on a physical basis the energy, which reaches the eye. This depends on the wavelength distributions of the emitted, reflected, or transmitted light. We also understand that the eye responds to a large range of colors despite the fact that it has only three different color receptors (cones). Based on the color matching experiments we know how to determine the color matching functions of the human visual system for a given set of primary colors. Note that these experiments were based on conducting the color matches in isolation from its surround.

The artist Joseph Albers has illustrated very clearly the fact that despite our predictions on a physical basis our impression of color is very different depending on the surrounding environment. His art and paintings, which depict many aspects of the global as contrasted to local behavior of the human visual system are well known. On two typewritten pages maximum using diagrams, verbally and graphically explain why we get these perceptual impressions.