(i)Rainbow is caused by scattering of sunlight by tiny water droplets, present in the atmosphere. (ii) A rainbow is always formed in a direction opposite to that of the Sun. (iii) The water droplets refract and scatter the incident sunlight, ...

When white light enters a Prism, different colours undergo refraction and as they enter a denser medium, they bend towards the normal at different angles.

The colours in ascending order of wavelength are: Violet, Indigo, Blue, after that Green, Yellow, Orange and lastly, Red. The wavelength of violet colour is the least (First stand in wavelength) and that of red (last stand in wave length) ...