What occurs when two colors of gels are placed in front of a lantern?

When two colors of gels are placed in front of a lantern, the correct concept at play is subtractive color mixing. In subtractive color mixing, when you place one colored gel in front of a light source, it filters out certain wavelengths of light while allowing others to pass through. When a second gel of a different color is then placed in front of the first, it further filters the light that has already been modified by the first gel.

This process works because each gel subtracts certain colors from the spectrum. For example, if you have a blue gel that filters out all the red and green wavelengths, and you then place a yellow gel in front of it, which filters out the blue part of the spectrum, the light that ultimately comes through will be a mix of what is left after both gels have done their filtering.

In contrast, additive color mixing involves creating colors by combining different wavelengths of light together, such as using light sources of different colors. Color temperature refers to the perceived warmth or coolness of a light source and is not related to the interaction of multiple gels. Dim out typically refers to the process of reducing the intensity of the light but does not pertain to how colors interact when gels are used. Thus, subtractive color