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Geometrical Optics question

2003 · Q129
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Geometrical Optics question

2003 · Q129

NEETPhysicsGeometrical OpticsMCQ+4 / −1
An equiconvex lens is cut into two halves along (i) XOX' and (ii) YOY' as shown in the figure. Let f,f′,f,f',f,f′, 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

AIPMT 2003 Physics - Geometrical Optics Question 40 English
  1. A
    f′=f,f′′=2ff' = f,f'' = 2ff′=f,f′′=2f
  2. B
    f′=2f,f′′=ff' = 2f,f'' = ff′=2f,f′′=f
  3. C
    f′=f,f′′=ff' = f,f'' = ff′=f,f′′=f
  4. D
    f′=2f,f′′=2ff' = 2f,f'' = 2ff′=2f,f′′=2f
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