Question

A lens having power 8 D is kept in contact with another lens having power -4 D. The lens combination will act as a?

• A. concave lens having focal length 25 cm
• B. concave lens having focal length 50 cm
• C. convex lens having focal length 25 cm
• D. convex lens having focal length 50 cm

Answer 1

Answer:

C. convex lens having focal length 25 cm

• The lens combination acts as a convex lens with a focal length of 25cm