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A ray of white light is passed through a...

A ray of white light is passed through a glass prism and a spectrum is obtained on a screen.
(a) Name the seven colours of the spectrum in order.
(b) Do the colours have the same width in the spectrum ?
(c) Which colour of the spectrum of white light deviates (i) the most, (ii) the least?

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ICSE-SPECTRUM-EXERCISE A
  1. Name three factors on which the deviation produced by a prism depends ...

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  2. How does the deviation produced by a triangular prism depend on the co...

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  3. How does the speed of light in glass change on increasing the waveleng...

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  4. Which colour of white light travels (a) fastest (b) slowest, in glass?

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  5. Name the subjective property of light related to its wavelength.

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  6. What is the range of wavelength of the spectrum of white light in (i) ...

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  7. (a) Write the approximate wavelength for (i) blue, and (ii) red light ...

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  8. Write the seven prominent colours present in white light in the order ...

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  9. Name the seven prominent colours of the white light spectrum in order ...

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  10. Name four colours of the spectrum of white light which have wavelength...

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  11. Which colour of the white light is deviated by a glass prism (i) the m...

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  12. The wavelengths for the light of red and blue colours are nearly 7.8 x...

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  13. Define the term dispersion of light.

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  14. Explain the cause of dispersion of white light through a prism.

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  15. Explain briefly, with the help of a neat labelled diagram, how does wh...

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  16. What do you understand by the term spectrum ?

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  17. A ray of white light is passed through a glass prism and a spectrum is...

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  18. The diagram shown below in Fig. 6.8 shows the path taken by a narrow b...

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  19. Fig. shows a thin beam of white light from a source S striking on one ...

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  20. (a) A beam of monochromatic light undergoes minimum deviation through ...

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