The magnifying power of a telescope depends on

Options :
  1. only the focal length of objective
  2. only the diameter of objective
  3. focal lengths of both the objective and eye lens
  4. diameters of both objective and eye lens

Answer and Explanation :-

Answer: Option 3


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Seen politically, systems follow one another, each consuming the previous one. They live on ever-bequeathed and ever-disappointed hope, which never entirely fades. Its spark is all that survives, as it eats its way along the blasting fuse. For this spark, history is merely an occasion, never a goal.
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