Lakhmir Singh and Manjit Kaur Solutions for Chapter: The Human Eye and The Colourful World, Exercise 15: Short Answer Type Questions

What is meant by the dispersion of white light? Describe the formation of the rainbow in the sky with the help of a diagram.

In the figure given alongside, a narrow beam of white light is shown to pass through a triangular glass prism. After passing through the prism, it produces a spectrum $\mathrm{Y}\mathrm{X}$ on the screen.

State the colour seen (i) at $\mathrm{X}$, and (ii) at $\mathrm{Y}$.

In the figure given alongside, a narrow beam of white light is shown to pass through a triangular glass prism. After passing through the prism, it produces a spectrum $\mathrm{Y}\mathrm{X}$ on the screen.

Why do different colours of white light bend through different angles with respect to the incident beam of light?

Draw a diagram to show how white light can be dispersed into a spectrum by using a glass prism. Mark the various colours of the spectrum.

Make two diagrams to explain refraction and dispersion.

Describe how you could demonstrate that white light is composed of a number of colours.

How could you show that the colours of the spectrum combine to give white light?

Which is refracted most by a prism: red light or violet light? Explain why?