Advertisements
Advertisements
Question
What is dispersion? Explain in detail.
Advertisements
Solution
- Splitting white light into its seven constituent colours (wavelength), on passing through a transparent medium is known as dispersion of light.
- Dispersion occurs because the light of different colours present in white light have different wavelength and they travel at different speeds in a medium.
- The refraction of a light ray in a medium depends on its speed.
APPEARS IN
RELATED QUESTIONS
Describe an activity to show that colours of white light splitted by a glass prism can be recombined to get white light by another identical glass prism. Also draw ray diagram to show the recombination of the spectrum of white light.
When a ray of light enters a prism, it bends ______ the normal; as it leaves the prism, it bends ______ the normal.
The colour of white light which is deviated the maximum on passing through the glass prism is:
(a) blue
(b) indigo
(c) red
(d) orange
A ray of light moving from an optically rarer to a denser medium
The property of splitting of white light into its seven constituent colours is known as
A ray of white light falls on a prism. Draw a ray diagram to show that the prism disperses the white light.
You are given a disc divided into seven sectors with colours violet, indigo, blue, green, yellow, orange and red in them. What would be its colour when it is rotated rapidly?
Refer to fig
(i) Name the lens L.
(ii) What are the points O, O' called?
(iii) Complete the diagram to form the image of the object AB.
(iv) Write three characteristics of the image.
State two properties of ultraviolet radiation which differ from visible light.
Rainbow is a beautiful natural phenomenon. It is the combined effect of a natural three processes together produced by light. Write it into the circle.
