Power of a lens of focal length 25 cm is
+2-5 Dioptre
+3 Dioptre
+4 Dioptre
+5 Dioptre
Answer is Right!
Answer is Wrong!
This question was previously asked in
UPSC NDA-2 – 2021
Power P = 1 / 0.25 m = 1 / (1/4) m = 4 Dioptre (D).
A positive power indicates a converging (convex) lens.