Long Waves to Short Waves

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Description

To find out more about the diagram above . . . . read on!

Long Waves to Short Waves

Look carefully at the diagram at the top of the page. Now check out the following questions (and answers)!

  1. Is an electromagnetic wave the same as a light wave?
  2. Is there a relationship between wavelength and colour?
  3. Can the wavelength of a wave be measured?
  4. Which has the longest wavelength, a red or a violet light wave?
  5. What is the range of wavelengths that correspond with what an observer might describe as green?

About the Diagram

Introducing the diagram! Read back and forward between the image at the top of the page and the explanation below!

This diagram shows six electromagnetic waves. Each wave corresponds with a colour within the visible spectrum that an observer might recognise.

Remember that:

  • Electromagnetic waves, which are a form of electromagnetic radiation, propagating from a light source, travel through space and encounter different materials.
  • Colour is not a property of electromagnetic radiation, but an aspect of visual perception.
  • A human observer can distinguish between colours corresponding with many thousands of wavelengths of light in the visible spectrum. These colours are often called spectral colours.
  • The largest part of the electromagnetic spectrum is outside the wavelengths of visible light and so invisible to a human observer.
  • Beyond red are infrared, microwaves and radio waves for example. Some radio waves have a wavelength longer than a kilometre (1000 metres).
  • Beyond violet are ultraviolet, X-rays, and gamma rays for example. Some gamma rays have a wavelength of one billionth part of a metre.
  • There are no properties of electromagnetic radiation that distinguish visible light from other parts of the electromagnetic spectrum.
  • Objects appear to be different colours to an observer depending on the wavelengths, frequencies and amplitude of visible light at the moment it strikes the retina at the back of the eye.

Follow the blue links for definitions . . . . or check the summaries of key terms below!

Some Key Terms

Move to the next level! Check out the following terms.

Colour

Things appear coloured because colour corresponds with a property of light that is visible to the human eye. The visual ...
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Electromagnetic spectrum

The electromagnetic spectrum includes electromagnetic waves with all possible wavelengths of electromagnetic radiation, ranging from low energy radio waves through ...
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ROYGBV

ROYGBV is an acronym for the sequence of hues (colours) commonly described as making up a rainbow: red, orange, yellow, ...
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Visible light

Visible light is the range of wavelengths of electromagnetic radiation perceived as colour by human observers. Visible light is a ...
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Visible spectrum

The visible part of the electromagnetic spectrum is called the visible spectrum. The visible spectrum is the range of wavelengths ...
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Wavelength

Wavelength is a measurement from any point on the path of a wave to the same point on its next ...
Read More

More Information

ABOUT SLIDES

Slides


All images on the lightcolourvision.org website are available for download as either slides or diagrams.

All slides share common specifications:

  • Titles: All slides have titles.
  • Backgrounds: Black, framed with a violet gradient.
  • Size: 1686 x 1124 pixels (3:2 aspect ratio).
  • Slides are available in two file formats: JPG, AI (Adobe Illustrator).

Slides are optimized for viewing on-screen or with a projector.
Diagrams are optimized for printing on A4 pages in portrait format.

ABOUT DIAGRAMS

Diagram


All images on the lightcolourvision.org website are available for download as either slides or diagrams.

All diagrams share common specifications:

  • Titles: No titles.
  • Backgrounds: White.
  • Size: 1686 pixels wide. So all diagrams reproduce at the same scale when inserted into Word documents etc.
  • Labels: Calibri 24pt Italic.
  • Diagrams are available in two file formats: JPG, AI (Adobe Illustrator).

Diagrams are optimized for printing on A4 pages in portrait format.
Slides are optimized for viewing on-screen or using a projector.

FILE TYPES - JPG

JPG file format


Download the image at the top of this page as a JPG file:

  • All JPG images available for download are 1686px wide.
  • Text on JPG images with white backgrounds is styled as Calibri 24pt Italic.
  • If the image you need is not exactly right, download it as an AI (Adobe Illustrator) file and edit it.
  • All the images on these Resource Pages were created in Adobe Illustrator and are vector drawings.

Did you know:

  • JPG stands for Joint Photographic Experts Group who created the standard.
  • The JPG file extension is used interchangeably with JPEG.
  • JPG files can be compressed for use on websites.
  • JPG files can be placed or pasted directly into MS Office documents.

FILE TYPES - AI

AI (Adobe Illustrator) file format


Download the image at the top of this page as an AI (Adobe Illustrator) file:

  • All AI images available for download from lightcolourvision.org are 1686px wide.
  • All the images on these Resource Pages were created in Adobe Illustrator and are vector drawings.
  • Vector drawing can be scaled up or down without any loss of quality.

Did you know:

  • AI  files downloaded from lightcolourvision.org can be re-edited using Adobe Illustrator for your own personal use.
  • Adobe Illustrator can save or export AI files to other formats including PDF (.pdf), PNG (.png), JPG (.jpeg) and SVG(.svg) etc.

DOWNLOAD AGREEMENT

Download agreement

Download Agreement


Before downloading or cutting and pasting from lightcolourvision.org we ask you to agree to the following terms:

  1. All information, images and other assets displayed or made available for download on the lightcolourvision.org website are copyright. This means there are limitations on how they can be used.
  2. All information, images and other assets displayed or made available for download are solely and exclusively to be used for personal, educational and non-profit purposes.
  3. When you find the resources you need, then part of the download process involves you (the user) ticking a box to let us (at lightcolourvision.org) know we both agree how the material can be used.
  4. Please contact [email protected] before considering any use not covered by the terms of the agreement above.

If you are a student, educator or researcher you might also like to read our posts Copyright: Credit where credit’s due and Citation and bibliographies before copying and pasting material into essays, assignments or other academic work. They include advice on avoiding plagiarism and how to credit other people’s words, images and assets before submitting your work for marking or assessment. If you are confused, just ask a friendly teacher, librarian, or other member of academic staff.


Like to know more?

Please contact [email protected] if you have questions about any aspect of this project.