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 Color Filters

Visible light is a specific range of electromagnetic waves with wave lengths of 390 to 700 nanometers. In terms of frequency, this corresponds to a band in the vicinity of 430770 THz.

Red color has the lowest frequency (between 430 and 480 THz). As the frequency of the light wave increases it gradually becomes orange, green, yellow and finally blue that has a frequency of 610 THz up to 670 THz.

The frequencies above 670 THz are purple (Violet) and gradually (when the frequency exceeds 750 THz) it becomes invisible (called ultra-violet).

The sunlight and most white lights contain a wide spectrum of visible lights. You can use a prism to break the white light to its components and see the entire color spectrum.

Color filters allow a narrow part of the color spectrum to pass thru. For example one color filter allows the passing of blue light (frequency of 610 THz - 670 THz).

Each color (or each visible light frequency) has specific chemical and physical properties. That is why filters are used to block certain colors and pass other colors.

For example red light does not affect the photography films and papers. Red lights are used in photography laboratories (known as Dark Rooms) to provide some visibility without damaging the photography films and papers. The violet color on the other hand is a high energy light that can quickly damage the exposed films and photography papers. Violet color and the invisible ultra violet color can cause discoloration, decomposition and other chemical changes.

Product Code: CFLTR

Set of 5 color filters made of clear/ transparent acrylic polymer (Plexiglass color filter). This set includes red, blue, orange, green and yellow filters.

Available in two different sizes. Small filters measure 2" x 2" (or 5cm x 5cm) while the large filters measures 4" x 4" (or 10cm x 10cm)and the thickness of 1/8" (or 3mm). Used for physics experiments including the demonstration of color addition and color subtraction. All color filters will be shipped with a protective mask. Use this link for the price of color filters and their availability.


Color Paddles

Color Paddles are simplified color filters used for young students. Color paddles are used to demonstrate the principles of color mixing.

The set of color paddles include  6 clear colored plastic paddles.

Price and availability of color paddles.

 

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