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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 a lens, follow these steps:
- Set Up: Place the lens on a stable surface, and position a screen or piece of white paper a specific distance away from it.
- Position the Object: Use a distant light source, such as sunlight or a distant lamp, to ensure that the rays of light are parallel when they enter the lens.
- Find the Image: Adjust the distance between the lens and the screen until you see a clear, focused image on the screen.
- Measure the Distance: Measure the distance between the lens and the screen. This distance is the focal length of the lens.