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Resource pages cover dozens of topics. Every one includes:
Featured image  |  Q&A’s  |  Explanation  |  Key terms  |  Additional information


READ AN ARTICLE

Read about light, colour, vision and how to see more in our library of hand-crafted articles


DEFINE A TERM

Find an explanation for any of the family of terms we use to talk about light, colour, vision and how to see more


ASK A QUESTION

Use the form below to find questions (and answers) related to the terms we use to talk about light and colour.
(Another section about vision is coming soon!)

How is frequency calculated?


Frequency of an electromagnetic wave in a vacuum is calculated by dividing the speed of light by the wavelength of the wave.

Search terms include:
|  Additive   |  Angle  |  |  Cell  |  Chromatic  dispersion  |  CMY  |  CMYK  |  Colour  |  Colour  constancy  |  Colour  |  Colour  model  |  Colour  wheel  |  Continuous  spectrum  |  Crest  |  Dispersion  |  Electric  field  |  Electromagnetic  radiation  |  Electromagnetic  spectrum  |  Electromagnetic  wave  |  Energy  |  Eye  |  Frequency  |  Gamma  ray  |  Hertz  |  Incident  light  |  Index  of  refraction  |  Law  of  refraction  |  Light  |  Long  wave  |  Low  frequency  |  Media  |  Medium  |  Monochrome  |  Non-spectral  |  Normal  |  Optical  | |  Optics  |  Primary  colour  |  Propagate  |  Radio  wave  |  Rainbow  |  Rainbow  colour  |  Ray  |  Reflection  |  Refraction  |  Refractive  index  |  RGB  colour  |  ROYGBV  |  RYB  |  Secondary  colour  |  Short  wave  |  Sine  |  Snell’s  law  |  Spectral  colour  |  Speed  of  light  |  Subtractive  colour  |  Tertiary  colour  |  Transparent  media  |  Vacuum  |  Visible  light  |  Visible  spectrum  |  Vision  |  Wave  |  Wavelength  |  White  light  |


RECENTLY ADDED IMAGES

Our images introduce ideas in an instant and are followed by explanations that burrow into the facts, one step at a time.
Find what you need and download images for free.


NEWSLETTER 2020

2020 Newsletter

Kia ora to all our friends, supporters and visitors.

In case all this is new to you, lightcolourvision.org is a non-profit project exploring light, colour, vision and also asks the question, how can we see more? In a nutshell, it’s all about making sense and developing our views of ourselves and the world. It’s designed as a resource for students, teachers, educators and researchers of all ages . . .


Read More


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