Edexcel IGCSE Physics 3.19 Glass refractive index practical
Practise planning and analysing a glass-block refractive index practical using angle measurements, repeats, graphs and gradient methods.
- Syllabus
- First assessment 2019
- Course
- Physics 4PH1
Exam points
- describe tracing incident and refracted rays for several angles using a glass block and protractor
- reject an anomalous angle before calculating a mean from repeat readings
- plot sin i against sin r and use the best-fit gradient to find refractive index
3.19 Glass refractive index practical question 1
A student does an investigation to determine the refractive index of a block made from flint glass.
She directs a ray of red light at the block, as shown in diagram 1.
Diagram 1
Describe how the student could improve her investigation to obtain a more reliable value of the refractive index.
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