Read the following passage and answer the questions given below.
Sir Isaac Newton was the first person to use a glass prism to obtain sun’s spectrum.
When white light is incident on the prism different colours bends through different
angles.Among the seven colour s red bends the least while violet bends the most.Seven
colours emerge along different paths and get separated and we get a spectrum of seven
colours.
1) Write seven colours in the order of increasing refractive index.
2) What is this process of separating the colours called?
3) What is the band of seven colours obtained called?
4) Do we get such a band of seven colours when a beam of light passes through a rectangular
glass slab?
5) Give one example of natural phenomenon based on the above property.
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