Home
Class 12
PHYSICS
Find the position of an object which whe...

Find the position of an object which when placed in front of a concave mirror of focal length 20 cm, produces a virtual image which is twice the size of the object.

Text Solution

Verified by Experts

The correct Answer is:
`u =- 10 cm`
Promotional Banner

Topper's Solved these Questions

  • RAY OPTICS

    SL ARORA|Exercise TYPE F|10 Videos

  • RAY OPTICS

    SL ARORA|Exercise TYPE I|12 Videos

  • RAY OPTICS

    SL ARORA|Exercise TYPE A|15 Videos

  • OPTICAL INSTRUMENTS

    SL ARORA|Exercise Problems for self practice|35 Videos

  • SOLIDS AND SEMICONDUCTOR DEVICES

    SL ARORA|Exercise PROBLEM_TYPE|9 Videos

Similar Questions

Explore conceptually related problems

Find the position of an object, which when placed in front of a concave mirror of radius of curvature 40 cm produces a virtual image, which is twice the size of the object.

An object placed in front of a concave mirror of focal length 0.15 m produces a virtual image, which is twice the size of the object. The position of the object with respect to the mirror is

An object is placed at a distance of 40 cm in front of a concave mirror of focal length 20 cm. The image produced is

Find the focal length and power of a convex lens, which when placed in contact with a concave lens of focal length 25 cm forms a real image 5 times the size of the object placed 20 cm from the combination.

An object is placed 25 cm in front of a concave lens of focal length 25 cm. The position of images is

An object is placed at 15 cm in front of a concave mirror whose focal length is 10 cm. The image formed will be

What is the distance of an object from a concave mirror of focal length 20 cm so that the size of the real image is three times the size of the object ?

SL ARORA-RAY OPTICS-Problems For Self Practice
  1. A candle flame 2 cm high is palced at distance of 2 metere from a wall...

    Text Solution

    |

  2. A dentist concave mirror has a radius of curvature of 30 cm. How far ...

    Text Solution

    |

  3. Find the position of an object which when placed in front of a concave...

    Text Solution

    |

  4. A concave mirror forms a real image four times as tall as the object p...

    Text Solution

    |

  5. When an object is placed at a distance of 60 cm from a convex spherica...

    Text Solution

    |

  6. A convex mirror produces a magnification of 1//2 when the object is pl...

    Text Solution

    |

  7. An object of 1cm^(2) face area is placed at a distance of 1.5m from a ...

    Text Solution

    |

  8. A rectangular tank 8m deep is full of water. By how much does the bott...

    Text Solution

    |

  9. A travelling microscope is focussed on a mark made on a paper. When a ...

    Text Solution

    |

  10. A printed page is kept pressed by a glass cube (mu = 1.6) of edge 6.0c...

    Text Solution

    |

  11. The velocity of light in glass is 2 xx 10^(8)ms^(-1) while that in vac...

    Text Solution

    |

  12. Calculate the index of refraction of a liquid from the following into ...

    Text Solution

    |

  13. While determining the refractive index of a liquid experimentally, the...

    Text Solution

    |

  14. A vessel contains water up to a height of 20 cm and above it an oil up...

    Text Solution

    |

  15. In Fig. a plane mirror lies at a height h above the bottom of a beaker...

    Text Solution

    |

  16. A cylindrical vessel of diameter 12 cm contains 800picm^(3) of water. ...

    Text Solution

    |

  17. If critical angle for a material to air is 30^(@), the refractive inde...

    Text Solution

    |

  18. An optical fibre (mu = 1.72) is surrounded by a glass coating (mu= 1.5...

    Text Solution

    |

  19. What is the small index of refractive of the material of a right angle...

    Text Solution

    |

  20. Find the maximum angle of refraction when a light ray is refracted fro...

    Text Solution

    |