(a) Demonstrate an activity with a well labelled diagram to prove that white light is made up of seven…
(a) Demonstrate an activity with a well labelled diagram to prove that white light is made up of seven colours.
(b) Which colour of light bends least and which one the most while passing out from the prism. Also state the reason for the same.
Solution
(a) To demonstrate that white light is made up of seven colours, take a prism. Allow white light to fall on its one focus through a pin hole. Rotate the prism until the coloured light emerge out from the prism. Collect these coloured lights on a screen or white sheet of paper. This prove that white light is made up of seven colours.
(b) Violet colour deviates most whereas red colour deviates least because they have different speeds in prism they have different refractive indices and hence have different angle of deviation.