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Answer the following questions: (a) Th...

Answer the following questions:
(a) The angle subtended at the eye by an object is equal to the angle subtended at the eye by the virtual image produced by a magnifying glass. In what sense then does a magnifying glass provide angular magnification?

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The angular dimension of image is equal to the angular dimension of object even if the absolute dimension is greater than that of object. Magnifier helps as following. By its help only, object can be placed nearer. Without its help object cannot be placed nearer than 25 cm. The angular dimension of object placed nearer is greater than that placed at 25 cm. In such a way, angular magnification can be obtained.
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KUMAR PRAKASHAN-RAY OPTICS AND OPTICAL INSTRUMENTS-SECTION-B (NUMERICALS)(NUMERICAL FROM TEXTUAL EXERCISE)
  1. An object 1.5 cm in size is placed on the side of the convex lens in t...

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  2. At what angle should a ray of light be incident on the face of a prism...

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  3. A card sheet divided into squares each of size 1 mm^(2) is being viewe...

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  4. (a) At what distance should the lens be held from the figure in Exerci...

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  5. What is the magnification in this case ?

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  6. (a) At what distance should the lens be held from the figure in Exerci...

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  7. What should be the distance between the object in Exercise 9.24 and th...

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  8. Answer the following questions: (a) The angle subtended at the eye b...

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  9. Answer the following questions: (b) In viewing through a magnifying ...

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  10. Answer the following questions: (c) Magnifying power of a simple mic...

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  11. Answer the following questions: (d) Why must both the objective and ...

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  12. Answer the following questions: (e) When viewing through a compound ...

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  13. An angular magnification (magnifying power) of 30X is desired using an...

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  14. A small telescope has an objective lens of focal length 140cm and an e...

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  15. For the telescope described in Exercise 9.3 (a), what is the separatio...

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  16. If this telescope is used to view a 100 m tall tower 3 km away, what i...

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  17. (a) For the telescope described in Exercise 9.28 (a), what is the sepa...

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  18. A Cassegrain telescope uses two mirrors as shown in Fig. 9.30. Such a ...

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  19. Light incident normally on a plane mirror attached to a galvanometer c...

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  20. Figure shows an equiconvex lens (of refractive index 1.50) in contact...

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