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JAMB Physics 1979 Question 11

Question 11

Lenses and Optical Instruments

The diagram in Fig. 2 shows the lens arrangement in

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

Answer: B (an astronomical telescope)

Explanation

Two converging lenses separated by fo + fe, with parallel rays from a distant object entering the objective, is the arrangement of an astronomical telescope in normal adjustment.