Multiple Choice Questions

Two lenses of powers 2 0 D and 2 5 D are combined to make an optical instrument The combination will...........

Science and technology and computer Physics

Two lenses of powers +2.0 D and -2.5 D are combined to make an optical instrument. The combination will

This questions was previously asked in

EPFO APFC 2023

act as a convex lens

act as a concave lens

act as a simple mirror

not form any image

- Two lenses are combined by summing their powers. Here, +2.0 D and -2.5 D are the powers.

- Calculation: (+2.0 D) + (-2.5 D) = -0.5 D.

- The result is -0.5 D, which indicates a net negative power.

- Negative power means the combination behaves like a concave lens.

- Concave lenses diverge light and have a net negative focal length.

Given analysis, the correct answer is:

Option 2: Act as a concave lens.

Submit Error