An oil film (n = 1.48) of thickness 290 nm floating on water isilluminated with white light at normal incidence. What is thewavelength of the dominant color in the reflected light? a. violet (404nm) b. blue-green (493nm) c. blue (470nm) d. green (541nm) e. yellow (572nm) can u show me how to do it and which one it would be?