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Why does glass have different refractive index for light beams of different colours according to wikipedia?
Wiki User
∙ 10y ago
It is not just glass, it is true for all media though which light can travel. If water [raindrops] did not, then you would never have a rainbow! The refractive index of a medium is a measure of the average refraction - as measured for white light. In fact, the angle of refraction depends on the wavelength of the light.
If the two interfaces between the two media (air to glass and glass to air, for example) are parallel then the different refraction at the first interface is exactly offset what happens at the second interface. So a beam of white light gets split up into the spectrum at the first and recombines into a beam of white light at the second interface. However, if the two interfaces are not parallel - as in a prism, or a raindrop, the result will be white light being split into the spectral components.
Wiki User
∙ 8y ago
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Find Different arrangements that can be made out of the seven colours of rainbow so that blue and green colours shall not come together?
The answer is 7! - 6! = 4320.
How do you form a picture using triangles and quadrilaterals?
Use different colours and tessalation. Works for me.
How many different skin colors exist?
There are virtually an infinite amount of different skin colours that exist since the possibilities of shades are infinite.
How many colours of apples are there?
There are 3 colours of apple.RedYellowGreen
What are the complementary colors of the primary and secondary colors?
The complimentary colours for the Primary colours are the Secondary colours made up of the mixture of the two remaining Primary colours. The Complimentary colours to the Secondary colours are the Primary colours not used to create them. Red - Green; Yellow - Purple; Blue - Orange. Green - Red; Purple - Yellow; Orange - Blue.
Why do waves disperse?
It is mainly due to the different wavelength of colours. The refractive index of the material changes according to the change in wavelength. So the deviations will be different for different colours. Hence dispersion.
Why does a prism cause white light to separate into the spectrum?
Because different colours have different have speeds in a prism , as refractive index depends on speed of the object therefore different colours have different refractive indexes
How do you xxplain the cause of dispersion?
When composite white light with seven colours as constituents enter into triangular prism, then different colours get refracted at different angles because of the different refractive index value of glass for different colours. Refractive index is defined as the ratio of the speed of light in free space to that in the glass medium. As the speed of the different colour differ, the refractive index varies. Hence they have different angle of refraction. So all the colours have been split up. As we use a triangular prism, as the refracted colours fall on the other face of the prism, once again separation becomes possible. Hence the phenomenon of dispersion. But this will not be possible when we use a rectangular glass slab. So triangular prism is essential to have dispersion.
What explains why a prism separate white light into the colors of the rainbow?
Different colours travel at different velocity in a glass medium. Refractive index is defined as the ratio of the velocity of light in free space to that in medium. So refractive index becomes different for different colours. Now by Snell's law the refractive index is inversely proportional to the angle of refraction. Hence different colours get deviated at different angle of refraction. So the splitting of composite white light into its constituent colours has become possible. If these again fall at a parallel surface as in the case of a glass slab the colours split would get combined back and emerge as white light. But we have prism where the two refracting surfaces are at inclined and further splitting takes place and hence dispersion.
Is the refractive index of glass the same for all colours of light?
No.
What is a colored lens made out of?
A coloured lens is made out of a thin, plastic lens that may be tinted to become different colours. The lens can be used to correct refractive error and other problems.
How do you make light into colours?
With a prism. Its separates the different colors of light for you. This wikipedia webpage shows how.http://en.wikipedia.org/wiki/Dispersive_prism
What are some examples of light?
According to the range of frequency of emission light has different colours in different frequenies. Violet. Indigo, Blue, green,Yellow, Orange,Red are the main colours of light.
Why are leaves different colours?
Leaves colors are according to the quantities of chlorophyll (which is green) the plant contains.
How do you see different colours?
We see different colours because other colours are being absorbed.
Why is white light dispersed by a glass prism?
When white light(composite light) consisting of various colors is passed through a prism, light of different colors will be deviated through different angles. Since the deviation is related to refractive index and refractive index to the color of light the deviation produced for different colors are different for same prism.That is the refractive indices are different for the various colors and this difference in the refractive indices is responsible for dispersion.
Why do the flame change colours according to the different element in flame test?
it has something to do with the chemical composition of the elements.
