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प्रश्न
What will happen if another similar glass prism is placed upside down behind the first prism?
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उत्तर
If a second, similar glass prism is placed upside down behind the first prism, recombination of seven colours takes place and a patch of ordinary white light is obtained on a screen placed behind the second prism. The recombination of colours took place because the second prism was placed upside down, because of which the refraction produced by the second prism was equal and opposite to the refraction produced by the first prism.
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संबंधित प्रश्न
As light rays emerge from a glass prism into air, are they refracted towards or away from the normal?
The colour of white light which suffers the maximum bending (or maximum refraction) on passing through a glass prism is:
(a) yellow
(b) orange
(c) red
(d) violet
The splitting of white light into its constituent colours is called .............
What do you understand by the term spectrum? Name the various colours present in the spectrum of sunlight.
- A beam of monochromatic light undergoes minimum deviation through an equiangular prism, how does the beam pass through the prism, with respect to its base?
- If white light is used in the same way as in part (a) above, what change do you expect in the emergent beam?
- What conclusion do you draw about the nature of white light in part (b)?
What conclusion do you draw about the nature of white light in part (b)?
The frequency range of visible light is from 3.75 × 1014 Hz to 7.5 × 1014 Hz. Calculate its wavelength range. Take speed of light = 3 × 108 m/s.
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.
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.
Complete the ray diagram given below to show the nature of light produced on the screen.
The completed ray diagram is as shown below:
The wavelength range of white light is ______.
Differentiate between a glass slab and a glass prism.
When white light enters a glass prism from the air, the angle of deviation is least for ____________.
The splitting of white light into its component colours is called ____________.
What is a rainbow?
During dispersion of white light by prism placed in air, for a particular value of angle of prism,
When sunlight passes through water droplets in the atmosphere it gets dispersed into its constituent colours forming a rainbow. A similar phenomenon is observed when white light passes through a prism.
Instead of sunlight, a green-coloured ray is passed through a glass prism. What will be the colour of the emergent ray?
