Edexcel A-Level Physics AS 2.3.48 Measuring Refractive Index Questions

Practise Edexcel IAL Physics 2.3.48 by calculating refractive index from measured ray paths, identifying a matching solid material and explaining why monochromatic light improves validity.

Exam points

deduce a solid material by calculating refractive index from measured ray or block data
explain why monochromatic light improves the validity of a refractive-index comparison

[Maximum number: 6]

A student determined the refractive index of a transparent material. The student had a semicircular block of the material as shown.

$Figure for Question Edexcel A-Level Physics AS 2.3.48 Measuring Refractive Index Questions question 1 — Edexcel A-Level Physics AS$

(a)

The student had a rectangular block of transparent material and made the measurements shown. Deduce whether this block is made of the same material as the block in (b).

Figure for Question (a) — Edexcel A-Level Physics AS

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(b)

The student used rays of white light.

Explain why using monochromatic light would increase the validity of the conclusion made in (c).

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Edexcel A-Level Physics AS 2.3.48 Measuring Refractive Index Questions question 1

Question (a)

Question (b)