Home
Class 12
PHYSICS
A linear object is placed along the axis...

A linear object is placed along the axis of a mirror as shown in figure. If 'f' is the focal length of the mirror then the length of image is-

A

`(2f)/(3)`

B

f

C

`(f)/(3)`

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
B
`(L_(i))/(L_(0)) = (-(-f)^(2))/((-(3)/(2)f+f)(-2f+f))`
`=(-f^(2))/((-(f)/(2))(-f))=2`
`L_(i) = 2L_(0) = 2 (2f -(3)/(2)f) = f`
Promotional Banner

Topper's Solved these Questions

Similar Questions

Explore conceptually related problems

A point object is placed on the axis of the concave mirror at a distance of 60 cm from the focal point of the mirror. Its image is formed at the point of object then focal length of the mirror is

A linear object AB is placed along the axis of a concave mirror. This object is moving towards the mirror with speed U. The speed of the image of the point A is 4U and the speed of the image of B is alSO 4U btu in opposite direction. If the center of the line AB is at a distance L from the mirror then find out the length of the object.

An object is placed on the principal axis of a concave mirror at a distance of 1.5 f(f is the focal length). The image will be at,

An object of length 2.5 cm is placed at a distance of 1.5 f from a concave mirror where f is the focal length of the mirror. The length of object is perpendicular to principal axis. Find the size of image. Is the image erect or inverted?

A short linear object of length b lies on the axis of a concave mirror of focal length F at a distance u from the pole. The length of the image will be

The distance of an object from a spherical mirror is equal to the focal length of the mirror. Then the image.

The distance of an object from a spherical mirror is equal to the focal length of the mirror. Then the image:

CAREER POINT-UNIT TEST 9-PHYSICS
  1. A boy of height H is standing in front of a mirror, which has been fix...

    Text Solution

    |

  2. Two plane mirror M(1) and M(2) are placed parallel to each other 20 cm...

    Text Solution

    |

  3. A linear object is placed along the axis of a mirror as shown in figur...

    Text Solution

    |

  4. Concave mirror and convex mirror having equal focal lengths 2f are pla...

    Text Solution

    |

  5. An infinitely long rod lies along the axis of a concave mirror of foca...

    Text Solution

    |

  6. In the figure shown (sin i)/(sin r) is equal to:

    Text Solution

    |

  7. The refracting angle of a prism is A and refractive index of the mater...

    Text Solution

    |

  8. A man looks down on a fish of length 20 cm. His eye is 2m above the su...

    Text Solution

    |

  9. A prism having an apex angle 4^(@) and refractive index 1.5 is located...

    Text Solution

    |

  10. A ray of light is incident on a prism as shown in fig. Find the total ...

    Text Solution

    |

  11. An optical fibre consists of core of mu(1) surrounded by a cladding of...

    Text Solution

    |

  12. Two identical glass (mu(g)=3//2) equiconvex lenses of focal length f a...

    Text Solution

    |

  13. A uniform, horizontal parallel beam of light is incident upon a prism ...

    Text Solution

    |

  14. Two thin lens have a combined power of 10D in contact. When separated ...

    Text Solution

    |

  15. A beam of plane polarized light falls normally on a polarizer of cross...

    Text Solution

    |

  16. A screen is placed 50cm from a single slit, which is illuminated with ...

    Text Solution

    |

  17. A slit of width is illuminated by white light. For red light (lambda=6...

    Text Solution

    |

  18. A beam of light AO is incident a glass slab (mu=1.54) in the direction...

    Text Solution

    |

  19. Magnification produced by astronominal telescope for normal adjustment...

    Text Solution

    |

  20. In a compound microscope, the focal lengths of two lenses are 1.5 cm a...

    Text Solution

    |