Abichromatic source produces light having wavelengths in vacuum of 450 nm and 650 nm. the indices of refraction are 1.440 and 1.420, respectively. in one situation, a ray of the bichromatic light, in the oll, is incident on the oll-air interface, at an angle of incidence of 40.0 degrees. the angle of dispersion between the two refracted rays in air is closest to to which measure? 2.5° 1.6° 2.8° 1.9° 2.20°