Question

A student performs an experiment where he allows passing a white beam of light through a prism as shown in the image.
What is likely to appear on the screen behind the prism?


(a)A single dark black line
(b)Pattern of different colours
(c)A single line of bright white light
(d) Series of lines of the same colour​

Answer 1

Answer:

b) pattern of different colours

Answer 2

A pattern of different colours will appear on the screen which is behind the prism.

• The white light divides into many colours when passing through the prism, these colors include red, orange, yellow, green, blue and violet.
• The red colour is obtained at the top because due to its longer wavelength.
• The colour that is obtained at the bottom most part is violet because it has a shorter wavelength. All the colours lie between then in the same order as mentioned above.
• This phenomenon is known as dispersion of light.