Answer :
To select only one color within the spectrum, you would need to use a narrow bandpass filter.
A spectrum consists of a range of colors with varying wavelengths. To isolate a specific color, such as a single wavelength within the spectrum, you can use a narrow bandpass filter.
A bandpass filter allows light of a specific range of wavelengths to pass through while blocking or attenuating light outside that range. By selecting a filter with a bandwidth corresponding to the desired color, you can effectively filter out other colors and allow only the desired color to pass through.
The bandpass filter can be placed in front of the light source or the surface where the colors are projected. This filter will selectively transmit light of the desired wavelength while blocking or minimizing other wavelengths.
By using a narrow bandpass filter, you can isolate and select a specific color within the spectrum, achieving the goal of selecting only one color.
Learn more about: Spectrum
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