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General Knowledge MCQs
Q
Which of the following can be used to focus sunlight
at one point?
AA. plane mirror
BB. convex mirror
CC. concave mirror
DD. convex lens
Correct Answer:
C. C. concave mirror
Explanation:
Both a concave mirror and a convex lens can converge parallel rays of sunlight to a single focal point:
Concave Mirror: Reflects and converges incoming light rays to a focal point.
Convex Lens: Refracts (bends) light rays inward, focusing them at a point.
Why Not Other Options?
A. Plane Mirror: Reflects light without convergence (rays remain parallel).
B. Convex Mirror: Diverges light rays (spreads them outward).
Final Answer: If only one option is allowed, choose C. Concave Mirror (more commonly associated with focusing sunlight in practical applications like solar furnaces).