(c) The refractive index of the material used to make the lens is determined using the formula d=5.02 cm ± 0.02 cm t=4.28 mm ± 0.01 mm f=11.6 cm ± 0.2 cm (i) Determine the value of n. n = 1 + 8tf n = (ii) Determine the percentage uncertainty in n. (2) (2)
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