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Identify the terms of paraxial rays ....

Identify the terms of paraxial rays .

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The rays of light close to the pole and which make small angles with the principal axis, are called paraxial rays.
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SUBHASH PUBLICATION-RAY OPTICS AND OPTICAL INSTRUMENTS-TWO MARKS QUESTIONS WITH ANSWERS
  1. Define the terms of principal axis of a mirror.

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  2. Give the Cartesian sign convention for measuring distances in spherica...

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  3. Identify the terms of paraxial rays .

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  4. Identify the terms of marginal rays of light.

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  5. Define the terms of principal focus F.

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  6. Define the terms of focal plane of the mirror.

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  7. Draw ray diagrams to show rays of light converging or appear diverging...

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  8. Define focal length of a mirror and hence relate focal length and radi...

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  9. Why do thick lenses show more chromatic aberration than thin lenses?

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

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

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

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  13. Define angular magnification.

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

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

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

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

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

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

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  20. Give any two consequences of refraction of light.

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