Sunlight - White or Coloured

${\lambda }_R$ and ${\lambda }_V$ are wavelengths of red and violet lights. Choose the correct option.

Primary colours of light are

How many colours consists in white light?

The danger signals installed at the top of tall buildings are red. These can be easily seen from a distance because among all other colours, the red light

When white light passes through the prism, colour which deviates the least is:

While performing an experiment of dispersion of white light through a prism, four students represented the dispersion pattern as shown below. Identify the correct representation:

How many colours are there in sunlight? Name them.

Write the name of colours of the sun rays.

If a red light ray is incident on a prism, what will happen?

The light travels with a lower speed in air than in water.

A concave lens is also known as _____ (converging lens / diverging lens).

The line joining the centre of curvature of two surfaces of a lens is called its _____. (optical axis/aperture)

The point of the lens through which the light goes undeviated after refraction is known as _____.

_____ is an example showing dispersion of light.

Splitting of light into its colours is known as _____ of light.

The splitting of light into its component colours is called _____.

By which optical phenomenon, the splitting of white light into seven constituent colours occur?

The process by which a beam of white light splits into its constituent colours is known as :