Home
Class 12
PHYSICS
For a given optical system, the principa...

For a given optical system, the principal axis is x-axis and coordinates of object are `(-30,+1,0)` and coordinates of image are `(+20,-2,0)` All coordinates are in cm.
If the optical system is a convex lens, what is its focal length?

A

12 cm

B

10 cm

C

`100/3` cm

D

`100/9` cm

Text Solution

Verified by Experts

The correct Answer is:
D

`1/2=x/(50-x)Rightarrowx=50/3 Rightarrow50-x=100/3`
`(1)/(100/3)+1/(50/3)=1/f Rightarrowf=100/9` cm
Promotional Banner

Topper's Solved these Questions

  • MASTER PRACTICE PROBLEM

    BANSAL|Exercise Reasoning|75 Videos

  • MASTER PRACTICE PROBLEM

    BANSAL|Exercise Multiple objective|131 Videos

  • MASTER PRACTICE PROBLEM

    BANSAL|Exercise Additional topic|70 Videos

  • FLUID MECHANICS

    BANSAL|Exercise PYQS AIEEE|10 Videos

  • SEMICONDUCTORS

    BANSAL|Exercise CBSE Question|32 Videos

Similar Questions

Explore conceptually related problems

For a given optical system, the principal axis is x-axis and coordinates of object are (-30,+1,0) and coordinates of image are (+20,-2,0) All coordinates are in cm. If the optical system is a concave mirror, it is located at what point?

The principal axis of a thin equi-convex lens is the x-axis. The co-ordinate of a point object and its image are (– 20 cm, 1 mm) and (25 cm, 2 mm) respectively. Find the focal length of the lens.

Optic axis of a thin equi-convex lens is the x-axis. The co-ordinates of a point object and its image are (-40 cm,1 cm) and (50 cm,-2 cm), respectively. Lens is located at

Optic axis of a thin equiconvex lens is the x-axis. The co-rodinates of a point object and its image axis (-40 cm, 1 cm) and (50 cm, -2 cm) respectively. Lens is located at

Point A (0, 1 cm) and B (12 cm, 5 cm) are the coordinates of object and image x-axis is the principal axis of the mirror. The, this object image pair is

BANSAL-MASTER PRACTICE PROBLEM-Comphrehension
  1. If the eye is kept very close to a coverging lens (focal length = 10 c...

    Text Solution

    |

  2. For a given optical system, the principal axis is x-axis and coordinat...

    Text Solution

    |

  3. For a given optical system, the principal axis is x-axis and coordinat...

    Text Solution

    |

  4. For a given optical system, the principal axis is x-axis and coordinat...

    Text Solution

    |

  5. Consider a transparent hemisphere (n=2) in front of which a small obje...

    Text Solution

    |

  6. Consider a transparent hemisphere (n=2) in front of which a small obje...

    Text Solution

    |

  7. Consider a transparent hemisphere (n=2) in front of which a small obje...

    Text Solution

    |

  8. In the front of the upper slit of YDSE apparatus, a thin film of a liq...

    Text Solution

    |

  9. In the front of the upper slit of YDSE apparatus, a thin film of a liq...

    Text Solution

    |

  10. In the front of the upper slit of YDSE apparatus, a thin film of a liq...

    Text Solution

    |

  11. A 500 g teapot and an insulated thermos are in a 20^(@)C room. The tea...

    Text Solution

    |

  12. A 500 g teapot and an insulated thermos are in a 20^(@)C room. The tea...

    Text Solution

    |

  13. A 500 g teapot and an insulated thermos are in a 20^(@)C room. The tea...

    Text Solution

    |

  14. In a container of negligible heat capacity 200 gm ice at 0^(@)C and 10...

    Text Solution

    |

  15. In a container of negligible heat capacity 200 gm ice at 0^(@)C and 10...

    Text Solution

    |

  16. In a container of negligible heat capacity 200 gm ice at 0^(@)C and 10...

    Text Solution

    |

  17. The energy-level scheme for the hypothetical one electron element Bans...

    Text Solution

    |

  18. The energy-level scheme for the hypothetical one electron element Bans...

    Text Solution

    |

  19. The energy-level scheme for the hypothetical one electron element Bans...

    Text Solution

    |

  20. The first nuclear reaction ever observed was by ernest Rutherford in 1...

    Text Solution

    |