Match each term to the best description.
1. Composed of numerous narrowly spaced parallel slits or grooves
2. Having the same wavelength, frequency, and in-phase Interaction of waves where they meet in space
3. The bending of waves near a boundary or as a wave passes through an opening
4. The zeroth order direct reflection fringe
a. Coherent
b. Diffraction
c. Grating
d. Specular dot
e. Interference