If the angle of the prism is 30o, then which of the following is an incorrect statement? Refractive index of the prism is √3. The light undergoes minimum deviation through the prism (i.e., r1 = r2).

VPH gratings can be sandwiched between glass prisms. This reduces the total beam deviation and reduces the air‐to‐glass incidence angle ($\\alpha _{0}$), for a given grating and wavelength. This can ...