Two thin lenses of power +3D and -1D are

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Target Exam

CUET

Subject

Physics

Chapter

Ray Optics

Question:

Two thin lenses of power +3D and -1D are held in contact with each other. Focal length of the combination would be:

Options:

5 m

50 cm

10 m

100 cm

Correct Answer:

50 cm

Explanation:

The correct answer is Option (2) → 50 cm