A violet laser pointer of wavelength 405 nm405\text{ nm}405 nm is directed normally at a diffraction grating with 500 lines per millimetre500\text{ lines per millimetre}500 lines per millimetre.
How many bright interference maxima can be observed on a distant screen?
444
888
999
111111
37 exam-style questions on AQA A Level Physics Refraction, diffraction and interference, covering Interference, Diffraction, and Refraction at a plane surface. Each one has a worked solution and a mark scheme showing where the marks go.