Physics · May / June 2024 · Paper 62 · Question 3
0625
As printed in the paper
The question as text
A student investigates the deviation of a ray of light passing through a transparent block ABCD and measures a quantity called the refractive index n of the block.
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3(a)(i)[1]
normal correct and labels N, M, G present and correct
3(a)(ii)[1]
60 (°) ± 1
3(b)[1]
lines FZ and EH present together with H, Z labelled correctly
3(c)(i)[1]
l = 7.5 ± 0.1 (cm)
3(c)(ii)[1]
d = 3.(0) ± 0.2 (cm)
3(c)(iii)[1]
d / l in the range 0.36 to 0.44 inclusive
3(d)[1]
repeat with θ = 60° on the other side of the normal OR repeat with optical pins
3(e)[1]
thickness of the light rays/difficulty in aligning incident ray with FE / difficulty of placing crosses accurately/difficult to judge the centre of the ray
3(f)(i)[1]
L = 4.3 ± 0.1 (cm)
3(f)(ii)[1]
n value in the range 1.40 to 1.65 inclusive
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