Visible light and Color

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Presentation transcript:

Visible light and Color

What is an observation? Something you see or notice

Look around the room with the lights on and off…. Light ON Light OFF

What’s the difference? Objects seem brighter and in more color when the light is on. Dark rooms lack color and detail.

What does it mean to be illuminated? An object reflects light

What types of light are there? Incandescent, fluorescent, neon, sodium vapor, tungsten, halogen

What does incandescent mean? WHITE HOT – filament gets hot

What is a filament? A small piece of coil that glows when it gets hot

What does all color depend on? How it reflects and refracts light

You see…. An objects color based on what light it reflects and absorbs

What about Black and white?

Why can’t you see well at night? There is no light to reflect off objects so your cones are not used at night

What about colored light? An object will look different colors based on the color of light because different colors are reflected or reflects into your eye

What is a prism? A triangular shaped translucent object which reflects light

Picture time!

Picture time!

Picture time!

Picture time!

What is Visible light Shorter wavelengths and higher frequencies than infrared… Colors ROYGBIV

Wavelength Red shortest Violet longest