Physics · May / June 2021 · Paper 61 · Question 3
0625
As printed in the paper
The question as text
A student investigates the refraction of light through a transparent block. Fig. 3.1 shows the transparent block ABCD on the student’s ray-trace sheet. eye D A C P3 P4 B Fig. 3.1
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3(a)[1]
Normal at centre of AB
3(b)[1]
EF and GH at 2.0 cm and 5.0 cm
3(c)(i)[1]
i = 30° ± 2° to the left of normal and above the block
3(c)(ii)[1]
P1P2 distance at least 5.0 cm but not greater than 15 cm
3(d)(i)[1]
a between 2.2 and 2.6 (cm) or 22 and 26 (mm)
3(d)(ii)[1]
b between 5.2 and 5.6 cm or 52 and 56 mm, and correct unit seen in (i) or (ii) and not contradicted
3(d)(iii)[2]
b / a value quoted with no unit
b / a lies within range 2.00 to 2.50
3(e)[1]
One from:
View bases of pins
Pins at least 5cm apart
Ensure pins are vertical
3(f)[2]
At least 4 additional values, all < 90°
Range at least 30°
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