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A small telescope has an objective of focal length 140 cm and an eye piece of focal length 5.0 cm . The magnifying power of telescope for viewing a distant object is:

Options

  1. A28
  2. B17
  3. C32
  4. D34

Correct answer

A. 28

Step-by-step solution

f₀=140 ~cm and f_e=5 ~cm For distant object, m= f₀ f_e = 140 5 =28

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