When a yellow card is observed through a blue glass, the card would appear.
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Correct Answer: Option A
Explanation:
Yellow light is a mixture of red and green light, hence, yellow will reflect red and green light. This means that a yellow object will appear red under red light, and green under green light. Yellow does not contain blue, so it will appear black under blue light.
Yellow light is a mixture of red and green light, hence, yellow will reflect red and green light. This means that a yellow object will appear red under red light, and green under green light. Yellow does not contain blue, so it will appear black under blue light.