A student shines a ray of light into a glass block. She measures the angle of refraction for different angles of incidence.
The Table shows her results.
Table
| Angle of incidence in degrees | 0 | 10 | 20 | 30 | 40 | 50 |
|---|---|---|---|---|---|---|
| Angle of refraction in degrees | 0 | 7 | 13 | 24 | 25 | 31 |
Identify the anomalous result in the Table.
Describe the relationship between the angle of incidence and the angle of refraction.
Use data from the Table in your answer.
When the angle of incidence is 0∘0^\circ0∘, the ray does not change direction.
Describe the direction of this ray as it meets the glass block.
Suggest one way the student could make her measurements of the angles more accurate.
The student repeats the experiment with a block of clear plastic. When the angle of incidence is 40∘40^\circ40∘, the angle of refraction is 28∘28^\circ28∘.
Which material, glass or plastic, changes the direction of the light more?
Explain your answer.
51 exam-style questions on OCR GCSE Physics 5.3 Wave interactions, covering 5.3.1 Wavelength and how substances affect waves, 5.3.2 Wave velocity in different substances, 5.3.3 Convex and concave lenses, 5.3.4 Ray diagrams for reflection and refraction, and 5.3.5 Colour, absorption and reflection. Each one has a worked solution and a mark scheme showing where the marks go.