Home
Class 12
PHYSICS
A concave mirror for face viewing has fo...

A concave mirror for face viewing has focal length of `0.4m`. The distance at which you hold the mirror from your face in oreder to see your image upright with a magnification of 5 is :

Text Solution

Verified by Experts

The correct Answer is:
0.32
Given `m=5 rArr (-v)/(u) = 5 rArr v = -5u`
`:.(1)/(-5u)+(1)/(u)=-(1)/(40) rArr u = 32 cm`
Promotional Banner

Topper's Solved these Questions

  • JEE MAIN REVISION TEST - 10| JEE -2020

    VMC MODULES ENGLISH|Exercise PHYSICS (SECTION 2)|5 Videos

  • JEE MAIN REVISION TEST - 13

    VMC MODULES ENGLISH|Exercise PHYSICS (SECTION 2)|5 Videos

Similar Questions

Explore conceptually related problems

A concave mirror has a focal length 20 cm. The distance between the two positions of the object for which the image size is double of the object size is

For a concave mirror of focal length f, image is 2 times larger. Then the object distance from the mirror can be

An object is moving away from concave mirror of focal length f starting from focus. The distance of an object from pole of mirror is x. The correct graph of magnitude of magnification(m) verses distance x is:

An object is placed at 20 cm from a convex mirror of focal length 20 cm. The distance of the image from the pole of the mirror is

A concave mirror of focal length f produces a real image n times the size of the object. What is the distance of the object from the mirror?

A buring candle is placed in front of a concave spherical mirror on its principal optical axis at a distance of (4//3)F form the pole of the mirror (here F is the focal length of the mirror). The candle is arranged at right angle to the axis. The image of the candle in the concave mirror impinges upon a convex mirror of focal length 2F . The distance between the mirrors is 3F and their axes coincide. The image of the candle in the first mirror plays the part of a virtual object with respect to the second mirror and gives a real image arranged between the two mirrors. Find the total linear magnification (magnitude only) of the system.

A convex mirror of focal length f produced an image (1//n)^(th) of the size of the object. The distance of the object from the mirror is

A convex mirror has a focal length f. A real object is placed at a distance f in front of it from the pole produces an image at

A plane mirror is placed at a distance of 50 cm from a concave mirror of focal length 16 cm. Where should a short object be placed between the mirrors and facing both the mirrors so that its virtual image in the plane mirror coincides with the real image in concave mirror? What is the ratio of the sizes of the two images?

A spherical mirror forms an image of magnification3. The object distance, if focal length of mirror is 24cm, may be

VMC MODULES ENGLISH-JEE MAIN REVISION TEST - 12 -PHYSICS
  1. A rigid square loop of side 'a' and carrying current I(2) is lying on ...

    Text Solution

    |

  2. The stream of a river is flowing with a speed of 2km//h. A swimmer can...

    Text Solution

    |

  3. A uniform cable of mass 'M' and length 'L' is placed on a horizontal s...

    Text Solution

    |

  4. A rectangular coil (Dimension 5 cmxx2.5 cm) with 100 turns, carrying a...

    Text Solution

    |

  5. A ball is through vertically up (taken as +z-axis) from the ground. Th...

    Text Solution

    |

  6. A capacitor with capacitance 5 mu F is chrged to 5 mu C. If the plates...

    Text Solution

    |

  7. A disc of mement of inertia I is rotating due to external torque. Its ...

    Text Solution

    |

  8. Taking the wavelength of first Balmer line in hydrogen spectrum (n = 3...

    Text Solution

    |

  9. If 'M' is the mass of water that rises in a capillary tube of radius '...

    Text Solution

    |

  10. A solid sphere of radius a and mass m is surrounded by cocentric spher...

    Text Solution

    |

  11. A simple pendulum oscillating in air has period T. The bob of the pend...

    Text Solution

    |

  12. The total number of turns and cross-section area in a solenoid is fixe...

    Text Solution

    |

  13. An NPN transistor is used in common emitter configuration as an amplif...

    Text Solution

    |

  14. The electric field of light wave is given as vec(E)=10^(-3)cos((2 pi ...

    Text Solution

    |

  15. In the density measurement of a cube, the mass and edge length are mea...

    Text Solution

    |

  16. A concave mirror for face viewing has focal length of 0.4m. The distan...

    Text Solution

    |

  17. A body of mass 2 kg makes an elastic collision with a second body at r...

    Text Solution

    |

  18. A moving coil galvanometer has resistance 50 Omega and it indicates fu...

    Text Solution

    |

  19. Determine to charge on the capacitor in the following circuit :

    Text Solution

    |

  20. An HCl molecule has rotational, translational and vibrational motions....

    Text Solution

    |