Safely uses a range of practical PS 2.3, 3.3, Evaluate results and diffraction equipment and materials draw conclusions, considering grating margins of error, accuracy and Makes and records precision of data observations ATc Use methods to increase accuracy ATe Use callipers to measure small distances, using vernier scales ATj Use a laser to investigate characteristics of light, including diffraction Student Required One hour lessons Learning Outcomes Specification Content Skills Covered Book Section Practicals CHAPTER 7 – Refraction and optical fibres (6 hours) 1 A reminder of reflection Recall the law of reflection 3.3.2.3 Refractive index of a MS 0.3 Use ratios 7.1, 7.2, 7.3 and refraction substance, Know and understand the Students observe definition for the refractive Students should recall that the demonstrations and index of a substance, refractive index of air is qualitatively explain them. approximately 1 Know that the refractive index of air can be taken to be 1 2 What is the mystery Recall and use Snell’s law of 3.3.2.3 Snell’s law of refraction for MS 0.6, 4.5 Use sin in problems 7.3 material? refraction for a boundary, a boundary, involving Snell’s law Students use Snell’s law to Carry out an investigation and MS 1.5 Identify uncertainties in work out the refractive index work out the uncertainties in measurements and determine of a substance using the measurements uncertainty when data are results from an investigation. combined
Safely uses a range of practical equipment and materials Makes and records observations PS 2.3, 3.3, Evaluate results and draw conclusions, considering margins of error, accuracy and precision of data ATc Use methods to increase accuracy ATe Use callipers to measure small distances, using vernier scales ATj Use a laser to investigate characteristics of light, including diffraction diffraction grating One hour lessons Learning Outcomes Specification Content Skills Covered Student Book Section Required Practicals CHAPTER 7 – Refraction and optical fibres (6 hours) 1 A reminder of reflection and refraction Students observe demonstrations and qualitatively explain them. Recall the law of reflection Know and understand the definition for the refractive index of a substance, Know that the refractive index of air can be taken to be 1 3.3.2.3 Refractive index of a substance, Students should recall that the refractive index of air is approximately 1 MS 0.3 Use ratios 7.1, 7.2, 7.3 2 What is the mystery material? Students use Snell’s law to work out the refractive index of a substance using the results from an investigation. Recall and use Snell’s law of refraction for a boundary, Carry out an investigation and work out the uncertainties in measurements 3.3.2.3 Snell’s law of refraction for a boundary, MS 0.6, 4.5 Use sin in problems involving Snell’s law MS 1.5 Identify uncertainties in measurements and determine uncertainty when data are combined 7.3