Physics · Oct / Nov 2021 · Paper 61 · Question 3
0625
As printed in the paper
The question as text
A student investigates the position of the image in a plane mirror. Fig. 3.1 shows the ray-trace sheet. M R P5 P3 P6 P4 Fig. 3.1
Read automatically from the paper; the printed page above is exact.
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3(a)[3]
Normal at 90°
Correctly placed lines at 40° ± 2° and 70° ± 2°
Both 7.0 ± 0.2 cm
3(b)[1]
P1P2 distance at least 50 mm on AB
3(c)[1]
α 70 ± 2°
3(d)[1]
Correct unit
3(e)[2]
At least 3 extra angles suggested
Range of at least 30°
3(f)[1]
One of:
Difficulty in lining up pins
Thickness of mirror
Thickness of pins / size of pin holes
3(g)[2]
Any two from:
Box 2 ticked
Box 3 ticked
Box 5 ticked
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