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A boy uses blue colour of light to find the refractive index of glass. He then repeats the experiment using red colour of light. Will the refractive index be the same or different in the two cases? Give a reason to support your answer.

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The correct Answer is:
The refractive index will be different.
Reason: The speed of blue light in glass is less than that of red light and refractive index of glass is
`mu=(c)/("speed of light in glass")." "therefore mu_("blue") gt mu_("red")`.
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ICSE-REFRACTION OF LIGHT AT PLANE SURFACES-EXERCISE-4(A)
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  2. What do you understand by the statement the refractive index of glass ...

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  3. A monochromatic ray of light passes from air to glass. The wavelength ...

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  4. A boy uses blue colour of light to find the refractive index of glass....

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  5. (a) For which colour of white light, is the refractive index of a tran...

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  6. Name two factors on which the refractive index of a medium depends ? S...

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  7. How does the refractive index of a medium depend on the wavelength of ...

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  8. How does the refractive index of a medium depend on its temperature ?

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  9. Light of a single colour is passed through a liquid having a piece of ...

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  10. In Figure, a ray of light A incident from air suffers partial reflecti...

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  11. The diagram alongside shows the refraction of a ray of light from air ...

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  12. The refractive index of water with respect to air is ""(a)mu(w) and of...

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  13. What is lateral displacement ? Draw a ray diagram showing the lateral ...

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  14. A ray of light strikes the surface of a rectangular glass slab such th...

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  15. In the adjacent diagram, AO is a ray of light incident on a rectangula...

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  16. A ray of green light enters a liquid from air, as shown in figure. Ang...

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  17. When an illuminated object is held in front of a thick plane glass mir...

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  18. Fill in the blanks to complete the following sentence: Q: When light...

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  19. Fill the blanks to complete the following sentence: Q: When light tr...

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  20. Fill in the blanks to complete the following sentence: Q: The refrac...

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