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Plan an experiment that will allow the student to determine an accurate value for the focal length $f$ of the lens. Write the plan for the experiment as directed.
Physics 5054 · O Level · Thin lenses
Thin lenses — practice question
A student is working with a converging (convex) lens and wants to find its focal length.
The focal length $f$ of a lens is obtained from the equation:
$f = \frac{uv}{u + v}$
where $u$ is the separation between the object and the lens and $v$ is the separation between the focussed image of the object and the lens.
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