The adjoining diagram shows the path taken by a narrow beam of yellow monochromatic light passing through a 60° glass prism. Now the yellow light is replaced by a narrow beam of the white light incident at the same angle. Draw another ray diagram to show the passage of the beam through the prism and label it, to show the effect of the prism on the light.


When a white light passes through a prism, it refracts and disperses into seven colors. As different colour have different wavelengths, therefore, its velocity also changes inside the prism resulting deviation at different levels.


11