Alternative to Practical: show readings, units and working. For a graph or circuit diagram, upload a clear image of your work on the supplied figure. Full-size measurement figures preserve print dimensions when printed at 100%.
(a)Read question and case materials as text
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A student investigates the image formed by a converging lens. Fig. 3.1 shows the object, lens and screen.
Fig. 3.2 shows the original triangular object at full size. Measure its height H in cm.
A student investigates the image formed by a converging lens. Fig. 3.1 shows the object, lens and screen.
Fig. 3.1Fig. 3.2
Fig. 3.2 shows the original triangular object at full size. Measure its height H in cm.
[1 mark]
(b)(i)Read question and case materials as text
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A student investigates the image formed by a converging lens. Fig. 3.1 shows the object, lens and screen.
At object distance u = 20.0 cm, Fig. 3.3 shows the full-size image on the screen. Measure its height h in cm.
At object distance u = 20.0 cm, Fig. 3.3 shows the full-size image on the screen. Measure its height h in cm.
Fig. 3.3
[1 mark]
(b)(ii)Read question and case materials as text
Text can be resized with your browser. Refer to the original figures below for diagrams and their layout.
A student investigates the image formed by a converging lens. Fig. 3.1 shows the object, lens and screen.
Using your image height h measured from Fig. 3.3, calculate 1/h in cm⁻¹ to two significant figures; add h and 1/h to Table 3.1.
Using your image height h measured from Fig. 3.3, calculate 1/h in cm⁻¹ to two significant figures; add h and 1/h to Table 3.1.
Fig. 3.3
Answer guidance
Using You must use the thing it names. An answer that reaches the right value another way may not score.
[1 mark]
(c)(i)
Table 3.1 gives object distance u, image height h and inverse image height 1/h. Complete the two missing units in its column headings.
Table 3.1 — complete the headings and inverse-height values
u / cm
h / …
1/h / …
20.0
…
…
25.0
3.9
…
30.0
2.6
…
40.0
1.6
…
50.0
1.1
…
Swipe sideways to see all columns.
Answer guidance
Complete Fill in every gap. A partly completed answer usually scores partly.
[1 mark]
(c)(ii)
Using the image heights in Table 3.1, calculate and record all remaining values of 1/h to two significant figures.
Table 3.1 — complete the headings and inverse-height values
u / cm
h / …
1/h / …
20.0
…
…
25.0
3.9
…
30.0
2.6
…
40.0
1.6
…
50.0
1.1
…
Swipe sideways to see all columns.
Answer guidance
Using You must use the thing it names. An answer that reaches the right value another way may not score.
[1 mark]
(d)
The screen is a 10 cm square. Using Table 3.1, suggest why object distances u below 20.0 cm are not used.
Answer guidance
Using You must use the thing it names. An answer that reaches the right value another way may not score.
[1 mark]
(e)Read question and case materials as text
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A student investigates the image formed by a converging lens. Fig. 3.1 shows the object, lens and screen.
On the supplied original blank grid (page 13), plot your completed Table 3.1 values of 1/h on the y-axis against u on the x-axis. Start both axes at (0, 0) and draw a straight best-fit line.
On the supplied original blank grid (page 13), plot your completed Table 3.1 values of 1/h on the y-axis against u on the x-axis. Start both axes at (0, 0) and draw a straight best-fit line.
Original blank graph grid, Q3(e), page 13
Plot your own points and straight line on the original blank grid. The worked example is available only after an attempt.
[4 marks]
(f)(i)
Using your line on the original graph grid (page 13), calculate gradient m. Indicate on your graph the values used and show all working.
Answer guidance
Using You must use the thing it names. An answer that reaches the right value another way may not score.
[2 marks]
(f)(ii)Read question and case materials as text
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A student investigates the image formed by a converging lens. Fig. 3.1 shows the object, lens and screen.
Using your gradient m from the graph and your measured H from Fig. 3.2, calculate lens focal length f = 1/(mH) in cm.
Using your gradient m from the graph and your measured H from Fig. 3.2, calculate lens focal length f = 1/(mH) in cm.
Fig. 3.2
Answer guidance
Using You must use the thing it names. An answer that reaches the right value another way may not score.
[1 mark]
(g)Read question and case materials as text
Text can be resized with your browser. Refer to the original figures below for diagrams and their layout.
A student investigates the image formed by a converging lens. Fig. 3.1 shows the object, lens and screen.
The hand and ruler block light when image height is read on the screen in Fig. 3.1. Suggest one apparatus improvement that avoids this.
The hand and ruler block light when image height is read on the screen in Fig. 3.1. Suggest one apparatus improvement that avoids this.
Fig. 3.1
Answer guidance
Suggest More than one answer may be acceptable, so long as it is consistent with the physics.
[1 mark]
5054/42/M/J/23Cambridge O Level Physics 5054 · May/June 2023 · Paper 4 variant 2 · Question 3