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प्रश्न
State True or False:
"Wavelength of red light is close to 700 nm.”
पर्याय
True
False
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उत्तर
This statement is True.
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संबंधित प्रश्न
As light rays pass from air into a glass prism, are they refracted towards or away from the normal?
As light rays emerge from a glass prism into air, are they refracted towards or away from the normal?
In the formation of spectrum of white light by a prism:
which colour is deviated least?
Describe how you could demonstrate that white light is composed of a number of colours.
Which of the following colour of white light has the least wavelength?
(a) red
(b) orange
(c) violet
(d) blue
Which is optically denser: water or air? Give reason
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.
Define the term dispersion of light.
In the spectrum of white light by a prism, the colour at the extreme end opposite to the base of prism is ______.
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 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.
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?
Which one of the following is involved for the formation of rainbow in the sky?
The angle of deviation through a prism is minimum when
- Incident rays and emergent rays are symmetric to the prism.
- The refracted ray inside the prism becomes parallel to its base.
- The angle of incidence is equal to that of the angle of emergence.
- When the angle of emergence has doubled the angle of incidence.
Choose the correct answer from the options given below:
In the following diagram showing dispersion of white light by a glass prism, the colours 'P' and 'Q’ respectively are:
