Photons, Fireflies and a Feeling for Colour

24/07/00


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Table of Contents

Photons, Fireflies and a Feeling for Colour

We will look at:

In 1666 Newton did 2 experiments with light

Dispersion

Light of different colour has a different wavelength

How do we detect colour?

The brain is also important in the process

The brain recognises background

The brain can compensate for background

The brain can generate an after image

The causes of colour

Emission - Things that shine in the dark

Emission

Atomic emission

Emission

Emission

Fire Flies

Colour in animals

Colour from absorption

The colour wheel

Colour from absorption

Absorption - reflection

The colour of minerals (Ligand field effects)

The colour of minerals (Charge transfer)

Organic molecules

Carrots make you see in the dark!

Colour in plants

Organic molecules as indicators

Dyes

Scattering

Sunset and sunrise

Diffraction & interference

Reflection

Colour in art

The effect of time

The effect of time

Author: School Of Chemistry

Email: george@chem.usyd.edu.au

Home Page: http://www.chem.usyd.edu.au/~george/