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A lens can be used to produce a clear image of a distant object on a screen - Edexcel - GCSE Physics - Question 3 - 2013 - Paper 1
Question 3
A lens can be used to produce a clear image of a distant object on a screen. (a) (i) Complete the sentence by putting a cross (X) in the box next to your answer. Th... show full transcript
Worked Solution & Example Answer:A lens can be used to produce a clear image of a distant object on a screen - Edexcel - GCSE Physics - Question 3 - 2013 - Paper 1
Step 1
Step 2
Describe how to measure the focal length of the lens.
Answer
To measure the focal length of the lens, follow these steps:
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Set up the apparatus: Place the lens in a holder on a straight surface. Position a screen on the opposite side of the lens.
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Use a distant light source: Aim a distant object (e.g., a window or lamp) at the lens. Ensure that it is far enough away so that it can be considered to be at infinity.
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Focus the image: Adjust the position of the screen until a sharp image of the distant object is formed on the screen.
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Measure the distance: Measure the distance between the lens and the screen using a ruler. This distance is the focal length of the lens.