Question

Two thin lenses have a combined power of +9D. When they are separated by a PY distance of 20 cm, their equivalent power becomes $+\frac{27}{5}D$, then their individual powers are

• A. 6D and 3D
• B. 6D and 4D
• C. 9D and 3D
• D. 9D and 6D

Answer 1

Answer: (A)

6D and 3D

Answer 2

The correct option is (A): 6D and 3D