The power of a corrective lens is -4.0 D. The lens is

Question

The power of a corrective lens is -4.0 D. The lens is (A) convex lens of focal length +25 cm (B) concave lens of focal length -25 cm (C) convex lens of focal length +4 cm (D) concave lens of focal length -4 cm

Tardigrade Admin · Accepted Answer

Correct answer is (b) concave lens of focal length -25 cm

Q. The power of a corrective lens is $- 4.0 D$ . The lens is

convex lens of focal length $+ 25 c m$

concave lens of focal length $- 25 c m$

convex lens of focal length $+ 4 c m$

concave lens of focal length $- 4 c m$

convex lens of focal length $+ 20 c m$

Correct answer is (b) concave lens of focal length $- 25 c m$

Q. The power of a corrective lens is −4.0D. The lens is

convex lens of focal length +25cm

concave lens of focal length −25cm

convex lens of focal length +4cm

concave lens of focal length −4cm

convex lens of focal length +20cm

Correct answer is (b) concave lens of focal length −25cm