Physics
High School (9–10)
Optics › The Human Eye and VisionOptics › Prisms and Dispersion of LightOptics › Light in the AtmosphereChapter 7The Human Eye and the Colourful World
You read this page because an image forms on a screen at the back of your eye. A rainbow appears after rain, the sky is blue at noon, and the Sun is red at sunset. Light explains all of these. In this chapter we study how the eye works and how spectacles correct it, how a prism splits white light into colours, and why the sky has the colours that we see. Python helps us calculate and draw.
Part of Physics · High School (9–10) (chapter 7)
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The Eye and Seeing
Close your eyes and open them. In a moment, an image forms on a screen at the back of each eye, and your brain turns it into a picture. In this course we study the parts of the eye, how it focuses on near and far objects, and how spectacles correct the eyes of a person who is short sighted or long sighted.
Prisms, Dispersion and the Rainbow
Sunlight looks white, but a glass prism or a drop of rain shows that it holds many colours. In this course we follow a ray through a prism, we find why white light splits into a spectrum, and we see how raindrops make a rainbow.