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If a single lens isused to form an image...

If a single lens isused to form an image, it is better to use a lens of large diameter, in which the outer parts near the rim are blocked off. Explain.

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PHYSICS GALAXY - ASHISH ARORA-GEOMETRICAL OPTICS-Discussion Question
  1. Can you obtain image produced by a convexlens on a screen without usin...

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  2. It is difficult to thread a needle with one eye closed. Why?

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  3. If a single lens isused to form an image, it is better to use a lens o...

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  4. What is the best position of the eye for viewing an object through a m...

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  5. Can the optical length between two points everbeless than the geometri...

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  6. Can two lenses of the same material produce achromatism when placed in...

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  7. Why is the aperture of objective lens of a telescope taken large ?

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  8. A iiver inside the sea observes a ship on the water surface. Does he f...

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  9. Why does the moon, purely white during the day, have a yellowish hue a...

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  10. How focal length of a spherical mirror changes when placed in differen...

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  11. An air bubble inside water broadly behaves as a concave lens. Is the t...

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  12. Why does an aeroplane flying at a great altitude not cast a shadow on ...

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  13. The magnifying power of a telescope in normal adjustment is greater th...

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  14. When sun rays pass through a small hole in the foliage at the top of a...

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  15. If a mirror reverses right and left, why doesn't it reverse up and dow...

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  16. Is it possible to photograph a virtual image?

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  17. Is it possible for a given lens to act as a converging lens in one med...

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  18. A camera lens is marked f//1.8. What is the meaning of this mark?

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  19. Some motor cars have additional yellow headlights. Why?

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  20. Why are lenses often coated with thin films of transparent material ?

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