TIERRA DEL FUEGO. WEATHER AND CLIMATE. In spite of its incendiary name, Tierra del Fuego -as well as the rest of Patagonia- has low temperatures and strong winds, sudden changes of weather, going from strong winds to complete calm, or from sunny to rainy conditions being very common.
Theories of Color Vision. 1  In 1802, Thomas Young proposed that all human vision occurred through the combination of sensitivity to red, green, and blue. This theory, modified by Hermann von Helmholtz in 1852, came to be known as the Young-Helmholtz or trichromatic (three-color) theory of color vision.
1) Understand ways in which color vision is helpful. 2) Be able to explain the relationship between wavelength and color perception. 3) Know the difference between subtractive and additive color mixing (think computer screen vs. printer) 4) Explain why the trichromatic theory of color vision is analogous to listening to a symphony.