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प्रश्न
Observe the given diagram and answer the questions:
- Name the process shown in the figure.
- Name the colour that deviates the most.
- Name the colour that deviates the least.
- Name any one phenomenon in nature which is based on the above process.
- Define ‘spectrum’.
उत्तर
- The process shown in the figure is the dispersion of light.
- The colour that deviates the most is violet.
- The colour that deviates the least is red.
- One phenomenon in nature based on the above process is the formation of a rainbow.
- A spectrum is a band of colours, as seen in a rainbow, produced by the separation of the components of light by their different degrees of refraction according to wavelength.
APPEARS IN
संबंधित प्रश्न
The path of a ray of light passing through a glass prism is shown below:
In this diagram, the angle of prism, angle of incidence, angle of emergence and angle of deviation, respectively, have been represented by:
(A) O, Y, Z and N,
(B) P, Y, M and Z,
(C) O, X, M and Z,
(D) P, X, Z and N.
In the formation of spectrum of white light by a prism:
which colour is deviated least?
Make two diagrams to explain refraction and dispersion.
What is a rainbow? What are the two conditions necessary for the formation of a rainbow in the sky?
What are the seven colours seen in a rainbow?
Out of the following, the colour of light having the maximum wavelength is:
(a) violet
(b) indigo
(c) green
(d) orange
A ray of white light is passed through a glass prism and a spectrum is obtained on a screen.
- Name the seven colours of the spectrum in order.
- Do the colours have the same width in the spectrum?
- Which of the colour of the spectrum of white light deviates (i) the most, (ii) the least?
In the following diagram, the correctly marked angles are
(A) All
(B) Only ∠i and ∠A
(C) ∠i, ∠r and ∠A
(D) ∠i, ∠A and ∠D
In which of the following four diagrams is the correct path of a ray of light passing through a glass prism shown ?
In an experiment to trace the path of a ray of light through a glass prism for different values of angle of incidence a student would find that the emergent ray:
(A) is parallel to the incident ray
(B) perpendicular to the incident ray
(C) is parallel to the refracted ray
(D) bends at an angle to the direction of incident ray
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?
Answer the following:
What do you mean by dispersion? Name the different colours of light in the proper sequence in the spectrum of light.
What do you understand by spectrum? Name the seven prominent colours in order, as obtained in the spectrum of white light.
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
The sunlight can be split into its constituent colors using ______.
The splitting of white light into its component colours is called ____________.
The periscope is an optical device with a polished surface that reflects the light falling on it.
State the colour which bends:
- The most.
- The least while passing through a glass prism.
