Context: In additive color devices such as computer displays and televisions, one of the primary light sources is typically a narrow-spectrum yellowish-green of dominant wavelength ~550 nm; this "green" primary is combined with an orangish-red "red" primary and a purplish-blue "blue" primary to produce any color in between – the RGB color model. A unique green (green appearing neither yellowish nor bluish) is produced on such a device by mixing light from the green primary with some light from the blue primary.

Question: What is produced on a computer display when light from the green primary is mixed with some light from the blue primary?
Answer: A unique green

Question: At what wavelength is green on computer displays?
Answer: ~550 nm

Question: What type of color devices are computer displays and televisions?
Answer: additive

Question: What is the wavelength of red?
Answer: Unanswerable

Question: How is a unique blue made?
Answer: Unanswerable

Question: What are examples of devices that do not use additive systems?
Answer: Unanswerable

Question: What is unique green's wavelength?
Answer: Unanswerable

Question: ~550nm green is a combination of which two primary colours?
Answer: Unanswerable