Multiple Choice Questions on Two thin convex lenses of focal lengths 4 cm and 8 cm are separated by a distance of 4 cm in air The........... for General Studies (Level 1) Preparation

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Multiple Choice Questions

Two thin convex lenses of focal lengths 4 cm and 8 cm are separated by a distance of 4 cm in air The...........

General Science (Easy) Physics
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Two thin convex lenses of focal lengths 4 cm and 8 cm are separated by a distance of 4 cm in air. The combination will have the focal length

4 cm

Correct Answer

8 cm

Incorrect Answer

12 cm

Incorrect Answer

32 cm

Incorrect Answer
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Explanation:

4 cm

Given :-

Focal length 

Focal length 

Distance d = 8 cm

The combination of the focal length is defined as:

Hence, The combination of the focal length is 4 cm.

 

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