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Questions
Define the term dispersion of light.
Define dispersion of light.
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Solution 1
The phenomenon of the splitting of white light by a prism into its constituent colours is known as dispersion of light.
Solution 2
When a beam of white light or composite light is refracted through any transparent media such as glass or water, it is split into its component colours. This phenomenon is called ‘dispersion of light’.
RELATED QUESTIONS
Draw a ray diagram to show the dispersion of white light.
State the cause of dispersion of white light
Which of the following colour of white light has the least wavelength?
(a) red
(b) orange
(c) violet
(d) blue
The speed of light in air or vacuum is
The diagram below shows the path taken by a narrow beam of yellow monochromatic light passing through an equiangular glass prism. If the yellow light is replaced by a narrow beam of white light incident at the same angle, draw another diagram to show the passage of white light through the prism and label it to show the effect of prism on the white light.
What conclusion do you draw about the nature of white light in part (b)?
When a white light ray falls on a prism, the ray at its first surface suffers ______.
In an experiment to trace the path of a ray of light through a triangular glass prism, a student would observe that the emergent ray
(a) is parallel to the incident ray.
(b) is along the same direction of incident ray.
(c) gets deviated and bends towards the thinner part of the prism.
(d) gets deviated and bends towards the thicker part (base) of the prism.
While performing the experiment to trace the path of a ray of light passing through a glass prism, four students marked the incident ray and the emergent ray in their diagrams in the manner shown below. 
(A) I
(B) II
(C) III
(D) IV
A glass prism is able to produce the spectrum when white light passes through it, but a glass slab doesn’t produce any spectrum. Explain why it is so.
A wave has wavelength 50Å of State the speed in vacuum.
State two uses of ultraviolet radiation.
Write the range of wavelength of the ultraviolet spectrum.
Draw a neat and labelled diagram for dispersion of light.
The splitting of white light in to seven colors is called ______.
The sunlight can be split into its constituent colors using ______.
State True or False:
"Wavelength of red light is close to 700 nm.”
Make a rainbow
Try to make your own rainbow. You can try this project in the morning or in the evening. Stand with your back towards the Sun. Take a hosepipe or a water pipe used in the garden. Make a fine spray in front of you. You can see different colours of rainbow in the spray.
