Question
If you're handed a converging lens, what can you do to estimate its focal length quickly?
Step 1
Hold the converging lens (also known as a convex lens) up to a distant object, such as a tree or a building, that is well-lit by sunlight or another bright light source. Show more…
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How can you estimate the focal length of a convex lens?
How could you very quickly make an approximate measurement of the focal length of a converging lens? Could the same method be applied if you wished to use a diverging lens? Explain.
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