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A riding glass though formed by spherica...

A riding glass though formed by spherical surfaces has zero power. Give reason.

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The radii of curvature of convex and concave surfaces are equal but one is positive and the other negative. These cancel with each other. Hence its power becomes zero.
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SUBHASH PUBLICATION-RAY OPTICS AND OPTICAL INSTRUMENTS-TWO MARKS QUESTIONS WITH ANSWERS
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  8. Write Snell's law in general mathematical terms.

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  9. Define the term angle of deviation.

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  14. Draw a neat labelled diagram of image formed in a refracting telescope...

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  16. Mention the three factors affecting lateral shift.

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  17. State the conditions for dispersion without deviation.

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  19. Show that m=(f)/(u+f) for a lens.

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  20. On what factors does the focal length of a lens depend?

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