The diffraction angle varies with the wavelength of the light. Light rays that pass through a diffraction grating are bent as a result of diffraction.

The distance between the slits or grooves is typically close to the wavelength of light. Diffraction is a property relating to the wave nature of light.Ī diffraction grating is an array of thousands of narrow parallel slits or grooves. Different wavelengths of light are diffracted at different angles, so different colors are seen.ĭiffraction is the apparent bending of waves around small obstacles and the spreading out of waves past small openings. Diffraction is thus a function of refractive index, wavelength, spacing of the slits, and angle of incidence. Diffraction occurs when the conditions in the Bragg equation n =2dsin are satisfied. When light rays pass through multiple slits, they are diffracted and then interfere constructively and destructively to produce the arrangements as shown above.