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In this activity, learners will explore the properties of color filters and filter bandpass by observing light sources using diffraction grating and color filters and create a graph of percent transmission versus wavelength to characterize the bandpass of the filter. This activity requires various light sources, a diffraction grating, and two or more color filters that are transparent to some wavelengths of light and opaque, or nearly opaque, at other wavelengths. This is an activity in the Touch the Sun educator guide.
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