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प्रश्न
State True or False:
"Wavelength of red light is close to 700 nm.”
विकल्प
True
False
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उत्तर
This statement is True.
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संबंधित प्रश्न
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?
A beam of white light falls on a glass prism. The colour of light which undergoes the least bending on passing through the glass prism is:
(a) violet
(b) red
(c) green
(d) blue
State the speed of light in (a) air, (b) water, and (c) glass
In figure AO is the ray of white light falling on a prism PQR. Complete the diagram till the light emerges out from the prism and falls on the screen.
In the spectrum of white light by a prism, the colour at the extreme end opposite to the base of prism is ______.
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
Refer to fig
(i) Name the lens L.
(ii) What are the points O, O' called?
(iii) Complete the diagram to form the image of the object AB.
(iv) Write three characteristics of the image.
If white light is used in same way what change is expected in the emergent beam?
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?
A wave has wavelength 50Å of State the speed in vacuum.
Answer the following:
What do you mean by dispersion? Name the different colours of light in the proper sequence in the spectrum of light.
Match the Columns:
| Column ‘A’ | Column ‘B’ |
| The wavelength of red light | (a) 600 nm |
| (b) 700 nm | |
| (c) 500 nm |
Draw a neat and labelled diagram for dispersion of light.
The splitting of white light in to seven colors is called ______.
Say TRUE or FALSE
Rainbow is formed by dispersion of which light by water drops
Say TRUE or FALSE
After passing through a prism, white light splits into a band of seven colours
What is dispersion? Explain in detail.
Which of the following is a natural phenomenon which is caused by the dispersion of sunlight in the sky?
What is a rainbow?
