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Draw a neat labelled diagram to show (i)...

Draw a neat labelled diagram to show (i) primary rainbow and (ii) secondary rainbow.

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SUBHASH PUBLICATION-RAY OPTICS AND OPTICAL INSTRUMENTS-TWO MARKS QUESTIONS WITH ANSWERS
  1. Why do thick lenses show more chromatic aberration than thin lenses?

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  2. Explain why convex lenses converge incident beam of light whereas conc...

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  3. Draw a neat labelled diagram to show (i) primary rainbow and (ii) seco...

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  4. Explain why the colour of the sky is blue (Cyan).

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  5. Define angular magnification.

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  6. Draw a neat labelled diagram of Cassegrain reflecting telescope.

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  7. Can plane and convex mirrors produce real images? Give an explanation ...

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  8. Answer the following questions: (b) A virtual image, we always say, ...

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  9. Write the formula for the lateral shift and explain the symbols used.

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  10. Write the formula for the normal shift and explain the symbols used.

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  11. Explain why there is an early sunrise or a late sunset.

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  12. Give any two consequences of refraction of light.

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  13. Write any two practical applications of optical fibres.

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  14. What is an optical fibre? Name the principle on which it works.

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  15. Distinguish between a pure and an impure spectrum.

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  16. Define power of a refracting surface. (Define the power of a lens).

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  17. Draw a neat diagram to show dispersion of light in a prism.

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  18. Why vaccum is a non-dispersive medium?

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  19. Can dispersive power of a prism be negative? Give reason for your answ...

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  20. Is the dispersive power independent on the angle of the prism? Give re...

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