Heat & Temperature

Low Frequency Light

White light is broken up into its component colors and the spectrum is cast upon a heat-sensitive liquid crystal screen. This material changes color when heated. Beyond the red portion of the spectrum the liquid crystal material changes color demonstrating the existence of invisible infrared radiation. Filters can be placed in the spectrum to see how they affect the infrared and visible portions of the spectrum. One of these filters lets through only the infrared and blocks all visible light while another lets through all visible light but blocks the infrared.

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