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Sunita prepares some equipment for a class practical - Edexcel - GCSE Physics - Question 2 - 2012 - Paper 1
Question 2
Sunita prepares some equipment for a class practical. She uses a metre rule, some white card and the light from a distant window. Describe how she could measure the... show full transcript
Worked Solution & Example Answer:Sunita prepares some equipment for a class practical - Edexcel - GCSE Physics - Question 2 - 2012 - Paper 1
Step 1
Describe how she could measure the focal length of a lens using this equipment.
Answer
To measure the focal length of the lens, Sunita can follow these steps:
- Setup Positioning: Place the lens on a flat surface and arrange the white card at a measurable distance behind it.
- Using the Meter Rule: Position the meter rule parallel to the lens and aim the distant window light through the lens towards the card.
- Focusing the Image: Move the card back and forth until a sharp image of the distant window appears on it.
- Measurement: Measure the distance from the lens to the white card where the sharp image is formed; this distance is the focal length of the lens.
Step 3