Monochromatic light from a distant point source is incident normally on a diffraction grating whose lines are arranged vertically. The plane of the diffraction grating is perpendicular to the incident light. A student observes the grating from a position close to it. What could the student see?
- Aa central point source with a series of point source images on either side
- Ba central vertical line with a series of spectra on either side
- Ca series of fine vertical lines
- Da single point source