A student uses this apparatus to investigate a converging lens - Edexcel - GCSE Physics - Question 5 - 2011 - Paper 1
Question 5
A student uses this apparatus to investigate a converging lens.
He sets the object distance at 15.0 cm.
He moves the screen until he can see a clear image and then... show full transcript
Worked Solution & Example Answer:A student uses this apparatus to investigate a converging lens - Edexcel - GCSE Physics - Question 5 - 2011 - Paper 1
Step 1
5(a)(i) - Point plotted
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Answer
The point representing the object distance of 15.0 cm and image distance of 60.0 cm should be plotted on the graph, with the uncertainties indicated as +/− ½ square.
Step 2
5(a)(ii) - Smooth curve drawing
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Answer
Draw a smooth curve through at least 5 points plotted from the data, ensuring that it connects well without any clear tramlining. Extrapolations beyond the data points should be ignored.
Step 3
5(a)(iii) - Relationship description
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Answer
It can be observed that as the object distance increases, the image distance decreases. This relationship is non-linear and does not follow a direct proportionality, implying that the relationship changes at a varying rate.
Step 4
5(a)(iv) - Image characteristics
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Answer
The images formed by the converging lens are magnified and are erect (the right way up). Additionally, these images are virtual, meaning they cannot be projected onto a screen.
Step 5
5(b) - Similarities and differences description
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Answer
Both reflectors and refractors use lenses or mirrors as eyepieces and produce images of distant objects. They both also magnify objects and provide real images produced by the objective.
However, the reflector uses mirrors to collect light, while the refractor uses lenses for the same purpose. Additionally, reflectors generally provide better image quality due to less aberration and they are easier to support compared to refractors.
