A parallel beam of red light with wavelength $700\,\text{nm}$ is incident normally on a diffraction grating that has $400$ lines per millimetre. What is the total number of intensity maxima produced by the grating?
- A6
- B7
- C8
- D9
Physics 9702 · AS & A Level · SI units
A parallel beam of red light with wavelength $700\,\text{nm}$ is incident normally on a diffraction grating that has $400$ lines per millimetre. What is the total number of intensity maxima produced by the grating?