Electromagnetic Waves Mr. Boyle Chatfield Senior High.

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Presentation transcript:

Electromagnetic Waves Mr. Boyle Chatfield Senior High

Speed of Light The speed of light (variable c) is 3 X 10 8 m/s. This is true for the whole electromagnetic spectrum.

ROY G BIV

Using a Classroom Projector to Study the Properties of Light Drs. Michael Ottinger and Brian Bucklein Missouri Western State University St Joseph, MO Missouri Association of Physics Teachers Meeting November 6, 2010

Three Color Image System Red Image Blue Image Green Image Superimpose Images Red Lamp Blue Lamp Green Lamp

Breaking down the Colors The following slides were made by using the “Shapes” drop down in PowerPoint to make two thin rectangular lines. The top line was set to white and, using the color setting the bottom line was set to different color combinations.

White

Red

Green

Blue

Yellow = Red + Green

Magenta = Red + Blue

Cyan = Green + Blue

White = Red + Blue + Green

What I look like RGB lamp

What color looks like under Sodium Lamp …

A question Winnie the Pooh (the yellow skinned bear) is placed under red light. How will he appear?

The answer

Other colors…

Other colors….

Other colors…

Me under infrared light

Intensity of Light Transparent – Light Completely passes through (Glass, transparency Translucent Light partially passes through (frosted glass) Opaque Light completely blocked.

Reflection of Light Mirrors…

Inverse Square Law of Light

Microwaves (High wavelength) Used for communication and to cook food. Microwaves work by resonating water molecules. Do not put foil in the microwave!

Light is a Particle? Radiometer

A demonstration

Light is a wave Polarization

Diffraction A wave property of light…

Light A discrete quantity of energy…. It is both a wave and a particle…

Laser Light Amplification by Stimulated Emission of Radiation…

Hologram An object beam interferes with an image beam…