Comparing Wavelengths of Red and Violet

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Description

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

Comparing Wavelengths of Red and Violet

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

  1. Name two units used to measure the wavelength of electromagnetic waves?
  2. What is the largest unit used to measure wavelength?
  3. What unit is used to measure wavelength within the visible spectrum?
  4. Do gamma rays have a shorter wavelength than visible light?
  5. How many picometres in a metre?

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 compares the wavelength of two electromagnetic waves that correspond with an observer’s perception of red and violet.

  • The diagram also looks at the units used when wavelength is being measured.
  • Notice that the wavelength of the red wave is much longer than the violet wave.
  • The wave cycle is measured from peak to peak and is marked by the dotted line.
  • The amplitude of both waves is the same.
  • Because the wavelength of the violet wave is shorter than the red its frequency is higher.
  • The unit of measurement of wavelength is the metre.
  • Because the wavelength of electromagnetic waves is so small, metres are sub-divided into micrometres, nanometres and picometres.
  • The number of each unit per metre is shown on the diagram.

Remember that:

  • The position of an electromagnetic wave within the electromagnetic spectrum is determined by its frequency or wavelength.
  • The electromagnetic spectrum includes, in order of increasing frequency and decreasing wavelength: radio waves, microwaves, infrared radiation, visible light, ultraviolet radiation, X-rays and gamma rays.
  • The electromagnetic spectrum includes all possible wavelengths of electromagnetic radiation, ranging from low energy radio waves through visible light up to high energy gamma rays.
  • The full range of wavelengths of visible light, between red and violet, is called the visible spectrum.

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.

Electromagnetic radiation

Electromagnetic radiation is a type of energy more commonly simply called light. Detached from its source, it is transported by ...
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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 ...
Read More

Electromagnetic wave

An electromagnetic wave carries electromagnetic radiation. An electromagnetic wave is formed as electromagnetic radiation propagates from a light source, travels ...
Read More

Nanometre

A nanometre is a unit of measurement of the wavelength of electromagnetic radiation ...
Read More

Wave diagram

In physics and optics, a wave diagram uses a set of drawing conventions and labels to describe the attributes of ...
Read More

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.
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  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?

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