Draw a diagram to show the refraction of light through a glass prism. On this diagram, mark (i) incident ray (ii) emergent ray, and (iii) angle of deviation.

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?

What is a rainbow? What are the two conditions necessary for the formation of a rainbow in the sky?

What acts as tiny prisms in the formation of a rainbow?