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प्रश्न
A beam of white light is shone onto a glass prism. The light cannot be:
(a) deviated
(b) dispersed
(c) focused
(d) refracted
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उत्तर
focussed
A beam of white light when shone on to a glass prism can be deviated, dispersed or refracted, but it cannot be focussed.
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संबंधित प्रश्न
In the following diagram, the path of a ray of light passing through a glass prism is shown:
In this diagram the angle of incidence, the angle of emergence and the angle of deviation respectively are (select the correct option):
(A) X, R and T
(B) Y, Q and T
(C) X, Q and P
(D) Y, Q and P
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.
(i) A ray of white light breaks up into its components while passing through a glass prism. Draw a ray diagram to show the path of rays.
(ii) Mark the least deviated colour in your diagram
(iii) Why do different coloured rays deviate differently in a prism?
As light rays pass from air into a glass prism, are they refracted towards or away from the normal?
In the figure given alongside, a narrow beam of white light is shown to pass through a triangular glass prism. After passing through the prism, it produces a spectrum YX on the screen.
Why do different colours of white light bend through different angles with respect to the incident beam of light?
Describe how you could demonstrate that white light is composed of a number of colours.
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
The seven colours in the spectrum of sunlight in order, are represented as :
Out of air and glass, which is optically rarer? Give reason.
An object AB is placed in front of a convex lens as shown in fig. 4. Complete the ray diagram and obtain the image formed and state the nature of the image.
Make the correct choice for each of the following:
Which one of the following Fig correctly shows the path of the ray through the glass block?
State two uses of ultraviolet radiation.
In the figure, a beam of light consisting of three colours blue, red, and yellow is incident on a prism and on a rectangular glass block respectively. Complete the diagram by drawings of the refracted and emergent rays.
Write an Explanation.
Critical angle
Observe the given figure and write appropriate phenomenon of light in the box.
The splitting of white light in to seven colors is called ______.
During dispersion of white light by prism placed in air, for a particular value of angle of prism,
______ colour is deviated the least in the spectrum of white light obtained with a glass prism.
State the colour which bends:
- The most.
- The least while passing through a glass prism.
