The place theory is not able to completely explain pitch perception because people can sense...

Learn about the structure and function of the ear's components. Explore and understand the frequency theory of hearing, the volley principle, and the place theory of hearing.

Review Edwin Land's retinex theory. Read about color constancy and examine its relation to the retinex theory of color. See how the brain processes the information.

Understand what is the Young Helmholtz trichromatic theory of color vision. Learn about the history behind this theory. See a comparison of trichromatic theory and opponent-process theory.

The Young-Helmholtz theory of color perception says that our eyes have just three types of color receptors and, to see the whole color spectrum, they have to function together. Discover how color perception works, what are the main receptors in the eye, and how color blindness can make people unable to distinguish some colors.