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Write the conditions for total internal reflection to takeplace?

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BETTER CHOICE PUBLICATION-REFRACTION OF LIGHT-SHORT ANSWER TYPE QUESTIONS
  1. What is meant by power of a lens? What does its sign indicate? State i...

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  2. Why diamond is hard while graphite is soft ?

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  3. Write the conditions for total internal reflection to takeplace?

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  4. How will you explain twinkling of stars?

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  5. When does snell's law in refraction fails?

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  6. The sun appears red at sun rise or sunset, why?

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  7. A concave mirror and a convex lens are held separetly in water. What c...

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  8. Answer the following questions: A diver under water, looks obliquely ...

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  9. Write the conditions for total internal reflection to takeplace?

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  10. Derive the expression for the power of two thin lenses placed in conta...

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  11. Explain total internal reflection. What are its conditions?

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  12. Prove the relation ""^(a)mu(b)=1/(""^(b)mu(a))

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  13. State generalized Snell's law of refraction through multiple parallel ...

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  14. Explain total internal reflection. What are its conditions?

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  15. Write the conditions for total internal reflection to takeplace?

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  16. State the condition of total internal reflection. Calculate the speed...

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  17. What are opiates? Give their functions.

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  18. What is the relation between critical angle and refractive index? What...

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  19. What are the uses of optical fibre?

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