When a red rose flower is observed in blue light, what colour does the observer...
PHYSICS
JAMB 2011
When a red rose flower is observed in blue light, what colour does the observer see?
- A) Red
- B) Blue
- C) Magenta
- D) yellow
Correct Answer: C) Magenta
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No colour is reflected because The colour present to the eye is the colour of it reflects. Red rose will absorb any other colour and reflect red. When viewed in The blue light it has no colour to be reflected so it appears black. Although red light and blue light = margenta
So in this case when there is no black in the option we go for margenta