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AQA · GCSE · Physics · Higher

Protractor Measurement Resolution

Q01.1 1 mark

A student investigated the refraction of light by a glass block. Figure 1 shows the protractor used to measure the angles of incidence and the angles of refraction.

Figure 1
Figure 1

Figure 1

Enlarged question image

Figure 1

What is the resolution of the protractor used to measure the angles?

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Marking points

  1. 1 States that the resolution is 1°.

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1°

Why this answer loses marks

The protractor is very accurate.

Accuracy is closeness to a true value; this question asks for the smallest scale division the instrument can distinguish.

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