what is meant by dispersion of light? Draw a ray diagram to show dispersion of white light by glass prism. Give reaason why do we get different colours of light
Answers
Answer:
The splitting of white light into its component colours is called dispersion.
Explanation:
All the colours travel in the same speed when they travel in vacuum. But when they hit a medium, such as a glass prism, the colours bend or refract at different angles, and therefore the speed changes. Thus they emerge in different, distinct directions which seem like a spectrum to us. Red colour bends the least and violet deviates the most . In short, we can say that the cause of this splitting of white light into its component colours is due to the different speeds of the colours in the white light when it hits a particular medium.
The diagram for dispersion of white light by a glass prism is shown.
Answer:
DEFINITION --
When white light is passed through a glass prism it splits into its spectrum of colours (in order violet, indigo, blue, green, yellow, orange and red) and this process of white light splitting into its constituent colours is termed as dispersion.
REASON FOR GETTING DIFFERENT COLOUR --
White light dispersion occurs because, as they pass through a prism, different colours of light bend through different angles with respect to the incident ray. The red light bends the least while the violet bends most as shown below.
