Visible Light Learning targets I can explain how
Visible Light Learning targets: • I can explain how visible light is produced. • I can illustrate the wavelengths of visible light
Introduction We can see rainbows because they are formed by visible light. What is visible light?
What is Visible Light? Visible light includes all the wavelengths of light the human eye can detect. It allows us to see the objects around us. What do you think we could see without visible light? Do organisms and plants require visible light?
Sources of Visible Light What sources of visible light can you see in our classroom?
Sources of Visible Light One source of visible light is the sun. The sun provides all the visible light living things need. Visible light travels across space from the sun to the Earth in electromagnetic rays.
How Visible Light Is Produced Sun and stars produce light because they are so hot. They glow with light due to their extremely high temperatures. This way of producing light is called incandescence.
How Visible Light is Produced Some objects produce light without becoming very hot. They generate light through chemical reactions or other processes. Producing light without heat is called luminescence.
Colors of Lights Visible light consists of a range of wavelengths. The wavelength of visible light determines the color that the light appears.
Recall What is incandescence? Define luminescence. What determines the color of visible light? Video Clip: What is light?
Summarizer Write a 20 word explanation on how visible light is produced
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