What are the two types of diffraction? And what type of diffraction is involved in diffraction grating?

Why do different colour lines broaden in width on going away from white light?

What will happen to the diffraction grating, if the slit is narrow or wider?

What is the difference between diffraction and interference?

Define resolving power and dispersive power (angular dispersion). How are they mathematically expressed?

Upon what factors does the resolving power of a grating depend?

Upon what factors does the dispersive power of a grating depend?

List the applications of diffraction grating.