A blue light is shined on objects X and Y. Object X appears to be blue, and object Y appears to be black. Which of the following is correct?

Question

A.
Object X absorbs blue light, and object Y reflects blue light.

B.
Object X reflects blue light, and object Y absorbs blue light.

C.
Object X must be black, and object Y must be blue.

D.
Object X must be blue, and object Y must be black.

Answer 1

The correct option is:

B. Object X reflects blue light, and object Y absorbs blue light.

Explanation:

• When a blue light is shined on an object and it appears blue, it means that the object is reflecting the blue light. Thus, Object X reflects blue light.
• On the other hand, if Object Y appears black under the blue light, it suggests that it absorbs the blue light rather than reflecting it. Hence, Object Y absorbs blue light.