An experiment is conducted to determine the focal length of a convex lens. Five students independently measure the focal length and obtain the following values:
24.1 cm,25.3 cm,24.5 cm,24.9 cm,24.7 cm 24.1\text{ cm}, \quad 25.3\text{ cm}, \quad 24.5\text{ cm}, \quad 24.9\text{ cm}, \quad 24.7\text{ cm} 24.1 cm,25.3 cm,24.5 cm,24.9 cm,24.7 cmWhat is the absolute uncertainty in this set of measurements?
0.3 cm0.3\text{ cm}0.3 cm
1.2 cm1.2\text{ cm}1.2 cm
0.6 cm0.6\text{ cm}0.6 cm
2.4 cm2.4\text{ cm}2.4 cm
26 exam-style questions on OCR A A Level Physics Making measurements and analysing data, covering Measurements and uncertainties. Each one has a worked solution and a mark scheme showing where the marks go.