Question

Additive synthesis utilizes the following colours :

• A. Red, green, blue
• B. Cyan, magenta, red
• C. Cyan, magenta, red, key
• D. None of the above

Hint:

RGB (Red, Green, Blue) is the additive colour model used in digital screens and light-based systems.

Answer 1

The Correct Option is A

Concept: Additive colour synthesis is a method of creating colours using light. In this system, different colours of light are combined together to produce various other colours. The primary colours used in additive synthesis are: \[ \text{Red, Green, Blue (RGB)} \] This model is widely used in:
• Television screens
• Computer monitors
• Mobile displays
• Digital projectors

Step 1: Understanding additive colour synthesis. In additive synthesis:
• Colours are created by adding light
• More light produces brighter colours
• Combining all RGB colours at full intensity produces white light The RGB model forms the foundation of digital display technology.

Step 2: Analyzing Option (A) Red, green, blue. These are exactly the three primary colours used in additive colour synthesis. Their combinations produce:
• Red + Green = Yellow
• Green + Blue = Cyan
• Blue + Red = Magenta
• Red + Green + Blue = White Therefore, this option is correct.

Step 3: Analyzing Option (B) Cyan, magenta, red. This combination is incorrect for additive synthesis. Cyan and magenta are usually associated with subtractive colour systems. Hence, Option (B) is incorrect.

Step 4: Analyzing Option (C) Cyan, magenta, red, key. This option resembles the CMYK colour model used in printing: \[ \text{Cyan, Magenta, Yellow, Key (Black)} \] It belongs to subtractive synthesis rather than additive synthesis. Hence, Option (C) is incorrect.

Step 5: Analyzing Option (D) None of the above. Since Option (A) is correct, this option cannot be correct. Hence, Option (D) is incorrect. Final Conclusion: Additive synthesis utilizes the colours: \[ \boxed{\text{Red, Green, Blue}} \] Therefore, the correct option is: \[ \boxed{(1)} \]