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General
Easy

Question

The values of d subscript 1 end subscript & d subscript 2 end subscript for final rays to be parallel to the principle axis are: (focal lengths of the lenses are written on the lenses)

  1. d subscript 1 end subscript equals 10 c m comma d subscript 2 end subscript equals 15 c m    
  2. d subscript 1 end subscript equals 20 c m comma d subscript 2 end subscript equals 15 c m    
  3. d subscript 1 end subscript equals 30 c m comma d subscript 2 end subscript equals 15 c m    
  4. N o n e blank o f blank t h e s e    

The correct answer is: d subscript 1 end subscript equals 20 c m comma d subscript 2 end subscript equals 15 c m

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