Light is a small section of the entire electromagnetic spectrum
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Bernard Nebel.
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Further experimentation showed that the light spectrum our eyes perceive is a very small segment of what is now called the electromagnetic spectrum. Type into your browser:
electromagnetic spectrum wavelengths images
Have students note other familiar things, e.g., X-rays, radio waves, are also parts of the electromagnetic spectrum. That is, their difference from light and from each other is only a matter of their wavelength. Give special attention to infrared (heat) radiation. This is particularly important when we come to a consideration of climate change.
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