Original MCQ based on chapter text
The power of a lens of focal length −0.25 m is:
−0.25 m فوکل لمبائی والے عدسے کی طاقت ہے:
Solution & explanation
Correct choice(s): (a)
(a) P = 1/f = 1/(−0.25) = −4 D.
Independent study material · English-medium textbook p. 77 · Original book ↗