Laser light of wavelength 450 nm450\text{ nm}450 nm is incident normally at a diffraction grating. The separation between adjacent lines (slits) is 2.2 × 10-6 m.
What is the total number of bright spots that can be observed in the diffraction pattern?
4
5
8
9
26 exam-style questions on OCR A A Level Physics Waves, covering Wave motion, Electromagnetic waves, Superposition, and Stationary waves. Each one has a worked solution and a mark scheme showing where the marks go.