Physics-
General
Easy

Question

An equiconvex lens is cut into two halves along (i) XOX¢ and (ii) YOY¢ as shown in the figure. Let f, f ¢, f ¢¢ be the focal lengths of the complete lens, of each half in case (i), and of each half in case (ii), respectively
Choose the correct statement from the following

  1. f to the power of ' end exponent equals 2 f comma f to the power of ″ end exponent equals f=2f,f=f'/>    
  2. f to the power of ' end exponent equals f comma f to the power of ″ end exponent equals f=f,f=f'/>    
  3. f to the power of ' end exponent equals 2 f comma f to the power of ″ end exponent equals 2 f=2f,f=2f'/>    
  4. f to the power of ' end exponent equals f comma f to the power of ″ end exponent equals 2 f=f,f=2f'/>    

The correct answer is: f to the power of ´ end exponent equals f comma f to the power of ″ end exponent equals 2 f

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