Final answer:
A color proof's appearance can change under different illuminations; colors perceived depend on an object's absorption and reflection of light. Illumination can dramatically shift the perceived color, and photons with higher energy can cause color fading under sunlight exposure. Light's wave nature also causes angle-dependent color reflections, as seen in compact discs.
Step-by-step explanation:
A color proof will indeed change its appearance under different light sources due to the phenomena of color perception and the characteristics of the light source itself. The true color of an object is characterized by how it absorbs and reflects different wavelengths of light. For example, if a pure blue object is illuminated with pure red light, it will appear black because it absorbs all the red light and does not reflect any to the viewer. This demonstrates that the illumination color can significantly alter how we perceive the color of an object.
Moreover, fading of colors like reds, yellows, and greens under sunlight more quickly than blues and violets is explained by the energy of photons. Higher-energy photons, which correspond to blue and violet light, can break down the chemical bonds in pigments, causing the fading of these colors over time when exposed to sunlight.
In terms of light's wave character, certain objects, such as a compact disc, reflect colors at various angles, not due to pigments but due to the wave nature of light. Therefore, the appearance changes with the angle of observation or the quality of light illuminating the object.