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JAMB Physics 2015 Question 2

Question 2

Lenses and Optical Instruments

The diagram above shows the lens arrangement in

Diagram for this question
  1. A.a compound microscope
  2. B.a binocular
  3. C.an astronomical telescope
  4. D.a periscope.
Show the answer and explanation

Answer: C (an astronomical telescope)

Explanation

Parallel light from a distant object enters a long-focus objective, and the lenses are separated by fo + fe: this is an astronomical telescope in normal adjustment.