Advertisements
Advertisements
प्रश्न
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.
- State the colour seen
- at X, and
- at Y.
- Why do different colours of white light bend through different angles with respect to the incident beam of light?
Advertisements
उत्तर
-
- The colour seen at X is violet (as it is the most deviated).
- The colour seen at Y is red (as it is the least deviated).
- Different colours of white light bend at different angles with respect to the incident beam of light. This is because different colours have different wavelengths.
APPEARS IN
संबंधित प्रश्न
After tracing the path of a ray of light through a glass prism a student marked the angle of incidence (∠i), angle of refraction (∠r) angle of emergence (∠e) and the angle of deviation (∠D) as shown in the diagram. The correctly marked angles are :
(A) ∠i and ∠r
(B) ∠i and ∠e
(C) ∠i, ∠e and ∠D
(D) ∠i, ∠r and ∠e
A student is observing a diagram showing the path of a ray of light passing through a glass prism. He would find that for all angles of incidence the ray of light bends:
- 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.
- Mark the least deviated colour in your diagram.
- Why do different coloured rays deviate differently in a prism?
As light rays emerge from a glass prism into air, are they refracted towards or away from the normal?
Which is refracted most by a prism : red light or violet light? Explain why?
A beam of white light is shone onto a glass prism. The light cannot be:
(a) deviated
(b) dispersed
(c) focused
(d) refracted
Which of the following colour of white light is least deviated by the prism?
(a) green
(b) violet
(c) indigo
(d) yellow
Why do you not see a spectrum of colours when light passes through a flat pane of glass?
The speed of light in air or vacuum is
How does the speed of light determine the optical density of a medium?
Define the term dispersion of light.
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.
In the spectrum of white light by a prism, the colour at the extreme end opposite to the base of prism is ______.
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
When we place a glass prism in the path of a narrow beam of white light a spectrum is obtained. What happens when a second identical prism is placed in an inverted position with respect to the first prism? Draw a labelled ray diagram to illustrate it.
A wave has wavelength 50Å of State the speed in vacuum.
Which characteristic property of light is responsible for the blue colour of the sky?
Write an Explanation.
Critical angle
The sunlight can be split into its constituent colors using ______.
State True or False:
"Wavelength of red light is close to 700 nm.”
