Explains the principles behind the pinhole camera.
An overview of the basics of optics, also discusses careers in science and engineering.
Defines the speed of light and describes how man learned to measure it. Includes interactive quiz.
Amusing guide lists various oddities about colour and light. Find trivia on 3D, mirrors, light bulbs, and contradictions about the perception of colour.
Explains light in terms of photons to explain reflection, refraction and absorption.
Uses geometry to predict reflection from plane and spherical mirrors, and looks at how speed and wavelength varies with different media.
Introduces optical effects resulting from light interaction with air, dust and haze particles, ice crystals and water droplets.
Uses example of sphere on a checkerboard to show how light is refracted.
From NASA, an overview of the different types of electromagnetic waves.
Explains additive and subtractive colour mixing, the mixing of wavelengths, Newton's dispersion of white light to show the colours of the rainbow.
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