EM Spectrum Timeline
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Timeline Graphic Organizer
Lesson Plans by Anna Warfield
A timeline is a type of graphic organizer that shows specific events in sequence, usually with dates, in a linear fashion. Storyboard That adds another dimension beyond dates and descriptions, by making it easy to illustrate important events!
The Electromagnetic Spectrum
By Oliver Smith
The electromagnetic spectrum, or EM spectrum, is all around us. The activities in this guide will help students master the different types of radiation in the EM spectrum.
Storyboard Description
EM Spectrum Timeline | How did the electromagnetic spectrum develop?
Storyboard Text
- Ibn al-Haytham - circa 1015
- EM Spectrum
- Al-Haytham showed that light travels in straight lines through different optical experiments.
- Johann Ritter - 1801
- William Herschel - 1800
- Ritter was looking at how fast silver chlroide changed when exposed to different colors of light. The silver chloride turned black fastest just outside the violet part. We now know this to be ultraviolet radiation.
- Herschel discovered infrared when he was experimenting to see the change in temperature of the different colors of light.
- Heinrich Hertz - 1886
- Hertz was the first person to send and receive radio waves.
- Wilhelm Röntgen - 1895
- When working with vacuum tube equipment he discovered an unknown type of rays which he named X. While experimenting with the rays he found that they can see through skin.
- Paul Villard - 1900
- Rn
- Alpha Beta Gamma
- While experimenting with radon, Villard discovered a type of radiation that was more penetrating than alpha or beta radiation. He had discovered gamma radiation.
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