will observe the remaining colours of VIBGYOR
To find answer this question, we need a little geometric reasoning. First of all, a rainbow is not the flat two dimensional arc as it appears to us. The rainbow you see is actually a three dimensional cone with the tip at your eye as shown in fig.- 15. All the drops that disperse the light towards you lie in the shape of the cone – a cone of different layers. The drops that disperse red colour to your eye are on the outer most layer of the cone, similarly the drops that disperse orange colour to your eye are on the layer of the cone beneath the red colour cone. In this way the cone responsible for yellow lies beneath orange and so on it till the violet colour cone becomes the innermost cone.(see in fig.- 14).
It is our common experience that the sky appears blue in colour on a bright dry day
To answer this question, you need to understand another phenomenon of light called scattering.
Let us see