Physics · May / June 2025 · Paper 61 · Question 3
0625
As printed in the paper
The question as text
A student investigates reflections in a plane mirror. A ray-trace sheet is shown in Fig. 3.1. P3 M R P4 eye Fig. 3.1
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3(a)[2]
normal neat and at 90°
incident ray in correct quadrant at 40° ± 2°
3(b)[1]
P1 P2 separation at least 5.0 cm
3(c)(i)[1]
incident ray and reflected ray and normal meeting at B within 2 mm
3(c)(ii)[1]
α = 48° ± 2°
3(d)[2]
new reflected ray drawn above MR in an appropriate quadrant
angle of reflection drawn 50° ± 2°
3(e)[2]
statement to match results
justification to include idea of results being equal within the limits of experimental error OR unequal if beyond the limits of experimental error
3(f)[2]
any two from:
thin pinsthin lines / sharp pencilview bases of pins / pins verticalpins far apart / at least 5 cm
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