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Define the term refractive index of a me...

Define the term refractive index of a medium. Can it be less than 1 ?

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No, speed of light in any medium is always less than that in vacuum
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ICSE-SELF ASSESSMENT PAPER -2-SECTION .B.
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  4. Define the term refractive index of a medium. Can it be less than 1 ?

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  5. A coin placed at the bottom of a beaker appears to be raised by 4.0 cm...

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  7. What is the other name given to it?

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  8. Name the law on which this principle is based.

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  9. From the diagram given below, answer the questions that follow: ...

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  10. From the diagram given below, answer the questions that follow: ...

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  11. From the diagram given below, answer the questions that follow: Wh...

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  13. When does the nucleus of an atom tend to be radioactive ?

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  14. How is the radioactivity of an element affected, when it undergoes a c...

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  15. State one use and one harmful effect of radioactivity.

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  16. Write an expression for the heat energy liberated by a hot body.

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  17. Some heat is provided to a body to raise its temperature by 25^(@)C. W...

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  18. What happens to the average kinetic energy of the molecules as ice mel...

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  19. Why is radioactivity considered to be a nuclear phenomenon?

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  20. The isotope of ""(92)U^(238) decays by alpha-emission to an isotope of...

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