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A mixture of blue and red pigment when illuminated by white light will appear

• A. Green
• B. Orange
• C. Purple
• D. Magenta

QUICK ANSWER…

C

DETAILS…

Magenta is wrong, I will explain…

There is a difference between the words ‘pigment’ and ‘white light’

There are three primary colours in terms of pigments, these are: red, blue, and yellow.

Colour combinations for pigments will yield:

Red + blue = purple

Blue + yellow = green

Yellow + red = orange

Similarly, there are three primary colours in terms of white light, these are red, blue, and green.

Colour combination for white light will be:

Red + blue = magenta

Blue + green = cyan

Green + red = yellow

Now for the right answer to the above question:

1. Option A is incorrect.
2. Option B is incorrect.
3. C is correct. for pigments, this is the answer.
4. D is not the correct answer. this is for white light.

KEY-POINTS…

You may please note these/this:

• The primary colors in terms of pigments are: blue, red, and yellow.
• The primary colors in terms of white light are: blue, red, and green.

Use the questions and answer section to correct, express, and contribute your views.

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/culled from 2019 JAMB-UTME physics question 40/