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Creativity / Colors and combinations / Grade 5 / cc5an

Compare Additive Colored-Light Mixtures - Practice 2

In this ideal RGB light model, red plus green gives yellow, green plus blue gives cyan, and blue plus red gives magenta.

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In this ideal RGB light model, red plus green gives yellow, green plus blue gives cyan, and blue plus red gives magenta. Equal full-strength red, green and blue give white. This is not a recipe for mixing paint or a reason to look into bright lights.

Worked example

Red and green light combined at equal full strength appear yellow in the model, while red and green paints need not do so.

Three labeled ideal RGB additive-light results: red plus green gives yellow, green plus blue gives cyan, and blue plus red gives magenta. This diagram does not describe paint mixing.
Three labeled ideal RGB additive-light results: red plus green gives yellow, green plus blue gives cyan, and blue plus red gives magenta. This diagram does not describe paint mixing.
Question 1 Ideal RGB light card 6: green alone at full stated strength. Which color is predicted?
Question 2 Ideal RGB light card 7: blue alone at full stated strength. Which color is predicted?
Question 3 Ideal RGB light card 8: green + red at full stated strength. Which color is predicted?
Question 4 Ideal RGB light card 9: blue + green at full stated strength. Which color is predicted?
Question 5 Ideal RGB light card 10: red + blue at full stated strength. Which color is predicted?

Make It Your Own

Optional theme: a place that changes overnight. Design a labeled paper diagram comparing one light mixture with a paint-mixture question you would need to investigate. Do not use lasers or stare into bright lights. You may draw, write or tell your idea. Use invented characters and places; no personal information or upload is needed. This activity is not scored.

Reflect on your choices

  • State that the model adds light rather than mixing pigments.
  • Explain one intentional choice and one possible alternative.
  • There is no required style or single correct creative response.