MadSci Network
The Mad Scientist Network: Microwave Physics
Using a question and answer format, this page attempts to answer the question "How much light do sunglasses block?" Explains polarized light and the ability of filters to selectively absorb polarized light.
York University
The Joy of Visual Perception: Physics of Visual Stimulus
From an online "book," this particular page describes physics principles related to vision and sight. Keywords are linked to other pages with further information. The role of sunglasses in blocking glare is discussed and explained. A...