Physics · May / June 2021 · Paper 62 · Question 2
0625
As printed in the paper
The question as text
A student investigates the position of the image in a plane mirror. Fig. 2.1 shows the ray-trace sheet that the student uses. eye M P3 P4 R Fig. 2.1
Read automatically from the paper; the printed page above is exact.
Show the answer and mark scheme
2(a)[2]
normal (any length) at centre of MR
CD and EF in correct positions
2(b)[1]
i = 20° ± 1°
2(c)[1]
P1P2 distance at least 5 cm / 50 mm and at most 15 cm / 150 mm
2(d)(i)[1]
a = 1.8 ± 0.1 (cm)
and b = 3.5 ± 0.1 (cm)
2(d)(ii)[1]
correct unit seen at least once and not contradicted
2(d)(iii)[1]
a / b = 0.51 / correct from candidate’s measurements
2(e)[2]
a / b = 0.506
both values of a / b with no unit
2(f)[1]
(expect YES and)
values are within the limits of experimental accuracy / error / uncertainty or
values (very) close / close enough / not (very) far apart / both round to the same number / approximately equal / within 5% (or 10%) of each other
2(g)[1]
any one from:
difficulty in lining up pins
size of pin holes / thickness of pins / thickness of lines
thickness of mirror
Make a free account to save your answers and see your weak topics and ask the AI why a wrong answer is wrong.