The Wonder of Light a study of the electromagnetic spectrum Mrs. Parker 4 th Grade.
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Transcript of The Wonder of Light a study of the electromagnetic spectrum Mrs. Parker 4 th Grade.
![Page 1: The Wonder of Light a study of the electromagnetic spectrum Mrs. Parker 4 th Grade.](https://reader036.fdocuments.us/reader036/viewer/2022062806/5697bfc01a28abf838ca3cf2/html5/thumbnails/1.jpg)
The Wonder of Light
a study of theelectromagnetic
spectrumMrs. Parker
4th Grade
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Put on yourPut on your rraaiinnbbooww glasses!glasses!
Look around for a few minutes with Look around for a few minutes with your special glasses on. Can you see your special glasses on. Can you see the light separating? the light separating?
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What is light?What is light?
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How does light travel?How does light travel?A) perfectly straight lineA) perfectly straight lineB) bends around objectsB) bends around objects
C) in a circleC) in a circle
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Let’s Make Shadow Animals
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Electromagnetic SpectrumElectromagnetic Spectrum
We can only see a very small portion (the We can only see a very small portion (the visible waves) of the visible waves) of the
Electromagnetic Spectrum.Electromagnetic Spectrum.
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• InfraredInfrared waves are felt
as heat.
• Microwave
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Where have we heard about Infrared Waves?
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ReflectionReflection
Reflection occurs Reflection occurs when light when light strikes a surface strikes a surface and bounces off. and bounces off. Light changes Light changes direction when it direction when it is reflected off a is reflected off a surface.surface.
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PRISMSPRISMS• Take out your prism and try to Take out your prism and try to
separate the light.separate the light.
• What are you creating?What are you creating?
• Why?Why?
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•What is a rWhat is a raaiinnbbooww??
•What shape is a rWhat shape is a raaiinnbbooww??
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The Visible Waves
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On the other side of the visible spectrum…….
UV X Ray Gamma Ray
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Why are sunscreen and sunglasses important?
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X rays have many uses in medicine.
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High-energy gamma waves are found in radioactive materials used
in nuclear power plants.
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Electromagnetic Spectrum
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Light can travel through fiber optics.
Where do we use fiber optics?
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Fiber Optics
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Have you ever used a laser?
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How do we use lasers?
Surgeries (LASIK)Price Scanning
CD PlayersDVD PlayersDental Drills
Heavy Duty/Accurate CuttingRadiation
PrinterLaser Speed Gun
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Let’s Play Tag! 5 hand held mirrors 1 laser pointer
Light travels in a straight line, but it can reflect!
The rays bounce off the mirrors and travel in a new direction.
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Create a bracelet made from UV beads
What do you think would happen to the beads if you put sunscreen on them?
Why?
Go outside and try it!