A convex lens of local length 40 cm is in contact with a concave lens of focal length 25 cm. The power of the combination is

  • -1.5 D
  • -6.5 D
  • +1.5 D
  • +6.5 D

Related Practice Tests

A convex lens of local length 40 cm is in contact with a concave lens of focal length 25 cm. The pow
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