3. QUESTIONS I. What is monochromatic light ? II. Attempt to deduce the above equation for n, or explain how you would go about doing this (consult your text book). III. Show qualitatively in a graph how the angle of deviation Dm varies with the angle of incidence on the prism. IV. Does the angle of refraction depend on the wavelength of the light that is used ? Are your values obtained for n compatible with accepted values (text book).