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प्रश्न
The phenomenon of splitting of light into its component colours is ___________ .
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उत्तर
The phenomenon of splitting of light into its component colours is dispersion.
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संबंधित प्रश्न
A narrow beam PQ of white light is passing through a glass prism ABC as shown in the diagram.
Trace it on your answer sheet and show the path of the emergent beam as observed on the screen DE.
(i) Write the name and cause of the phenomenon observed.
(ii) Where else in nature is this phenomenon observed?
(iii) Based on this observation, state the conclusion which can be drawn about the constituents of white light.
Draw a ray diagram to explain the term angle of deviation.
In the following diagram the correctly marked angles are :
(a) ∠A and ∠e
(b) ∠i, ∠A and ∠D
(c) ∠A ∠r and ∠e
(b) ∠A ∠r and ∠D
In the formation of spectrum of white light by a prism:
which colour is deviated least?
What conclusion do you draw about the nature of white light in part (b)?
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.
Complete the ray diagram given below to show the nature of light produced on the screen.
The completed ray diagram is as shown below:
An object is placed in front of a converging lens and in front of a diverging lens as in fig.
(a)Complete the ray diagram to obtain an image.
(b)Compare the nature of image formed by both the lenses in the above case.
A wave has wavelength 50Å of name the wave.
A wave has wavelength 50Å of State the speed in vacuum.
Write three conditions necessary to obtain a pure spectrum on a screen. Name the instrument in which the conditions stated by you are fulfilled.
State two properties of ultra-violet radiations which differ from visible light.
What do you understand by spectrum? Name the seven prominent colours in order, as obtained in the spectrum of white light.
Write the range of wavelength of the infrared spectrum.
Match the Columns:
| Column ‘A’ | Column ‘B’ |
| The wavelength of red light | (a) 600 nm |
| (b) 700 nm | |
| (c) 500 nm |
What is dispersion? Explain in detail.
What is Newton’s disc?
In dispersion, the color of light that will bend more is ______.
State True or False:
"Wavelength of red light is close to 700 nm.”
