Cambridge International AS & A Level Physics · AS 7 · data analysis
Single-slit diffraction from a cyan laser
Waves · Original GioPhysics question with a detailed, mark-by-mark answer guide.
- Demand
- discriminating
- Marks
- 5
- Topics
- 3
- Answer
- Complete
Question5 marks
Radiation from a cyan laser has wavelength 4.9 × 10⁻⁷ m. The first diffraction minimum occurs at 9.6° from the centre. Using a sin θ = λ, calculate the slit width a.
Task interpretation
What a complete response should do
Identify the useful evidence, process it with units, and make only the conclusion the data supports.
Make assumptions explicit, connect several ideas, and test whether the final result is physically reasonable.
- Response type
- data analysis
- Allocation
- 5 marks
- Demand
- discriminating
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