ConceptLens Formula and Magnification

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#### Question

A student was asked by his teacher to find the image distance for various object distance in case of a given convex lens. He performed the experiment with all precautions and noted down his observations in the following table:

S. No. | Object distance (cm) | Image distance (cm) |

1 | 60 | 15 |

2 | 48 | 16 |

3 | 36 | 21 |

4 | 24 | 24 |

5 | 18 | 36 |

6 | 16 | 48 |

After checking the observations table the teacher pointed out that there is a mistake in recording the image distance in one of the observations. Find the serial number of the observations having faulty image distance.

(A) 2

(B) 3

(C) 5

(D) 6

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#### Reference Material

Solution for concept: Lens Formula and Magnification. For the course CBSE