Question

A prism splits white light into constituent colours (VIBGYOR). Choose the correct option.
A. White light is composed of seven colours.
B. We cannot see other colours in wavelengths 380nm to700nm.
C. We cannot see other colours outside wavelength 380nm to 700nm.
D. None of these.

Answer 1

Hint: One could think of all the properties that are related to white light. Then you could think of this phenomenon that is mentioned in the question. Then you could read the options that are given under the question and hence find the correct ones coming under them.

Complete step-by-step solution:
In the question, we are given a statement that a prism splits white light into its constituent colours. We are then given a few options from which we have to find the correct answer.
One should be aware of the fact that we shouldn’t always overestimate the power of our eyes, especially science students. We should note that the composition of white light is much wider than you think it is. On passing this white light through a prism it is split into seven colours which falls under the visible region. As human eyes are only sensitive to the wavelength range of 380nm to 700nm, we are unable to see outside this region.
So, we found options A and C to be true.

Note: Dispersion is the term given to the splitting of white light on being passed through a glass prism. Dispersion figuratively means distributions of white light into its constituent colours. The splitting takes place at various frequencies and also at different angles. The colours are violet, indigo, blue, green, yellow, orange and Red.