A certain thin lens is made of glass with refraction index lens = 1.500. In air, where the index of refraction is 1.000, the lens has focal length fo = 10.0 cm. What is the focal length f of the lens when immersed in water, where the index of refraction is 1.330? f = cm The index of refraction of silicate flint glass for red light is 1.620 and for violet light is 1.660. A beam of white light in this glass strikes the glass-air interface at a 26.70° angle of incidence and refracts out into the air. What is the angular separation between the red and violet components of the spectrum that emerges from the glass? angular separation: °