How many colours can you identify in the rainbow? Write their names.

What will happen if another similar glass prism is placed upside down behind the first prism?

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?

Regarding propagation of light, the correct statement is :

Fill in the blank with a suitable word:

By mixing blue and yellow colours, we get _____ (green/grey) colour.