Home
Class 12
PHYSICS
A convex lens is placed in contact with ...

A convex lens is placed in contact with a mirror as shown. If he space between them is filed with water, its power will

A

decreases

B

increases

C

remain unchanged

D

increases or decreases depending of the focal length

Text Solution

Verified by Experts

The correct Answer is:
A
The power of the given system is a combination of the positive powerof the convex lens, negative power of the plane mirrorr. Clearly, the power of the system decreases.
Promotional Banner

Topper's Solved these Questions

  • GEOMETRICAL OPTICS

    A2Z|Exercise Prism Theory And Dispersion Of Light|45 Videos

  • GEOMETRICAL OPTICS

    A2Z|Exercise Optical Instruments|55 Videos

  • GEOMETRICAL OPTICS

    A2Z|Exercise Section D - Chapter End Test|30 Videos

  • ELECTROMAGNETIC WAVES AND COMMUNICATION SYSTEM

    A2Z|Exercise Section D - Chapter End Test|30 Videos

  • MAGNETISM AND MATTER

    A2Z|Exercise Section D - Chapter End Test|30 Videos

Similar Questions

Explore conceptually related problems

A thin equiconvex lens of refractive index 3//2 is placed on a horizontal plane mirror as shown in figure. The space between the lens and the mirror is filled with a liquid of refractive index 4//3 . It is found that when a point object is placed 15 cm above the lens on its priincipal axis, the object coincides with its own image. Q. The radius of curvature of the convex surface is

A thin equiconvex lens of refractive index 3//2 is placed on a horizontal plane mirror as shown in figure. The space between the lens and the mirror is filled with a liquid of refractive index 4//3 . It is found that when a point object is placed 15 cm above the lens on its priincipal axis, the object coincides with its own image. Q. If another liquid is filled instead of water, the object and the image coincide at a distance 25 cm from the lens. Calculate the refractive index of the liquid.

A thin bi-convex lens made up of glass of refractive index 3//2 is placed is front of a plane mirror. The space between the lens and the mirror is filled with water of refractive index 4//3 . The radii of curvatures of the lens are R_(1)=15cm and R_(2)=25 cm . A point object is placed at distance x from the surface whose curvature is R_(1) . The distance x is greater than the separation between the lens and the mirror. Find the value of x so that image must coincide with the object.

Two equi convex lenses each of focal lengths 20 cm and refractive index 1.5 are placed in & contact and space between them is filled with water of refractive index 4/3 . The combination works as

A convex lens is placed in contact with a plane mirror. An axial point object at a distance of 20 cm from this combination, has its image coinciding with itself. What is the focal length of the convex lens ?

An equi-convex lens, having radius of curvature 33 cm is placed on a horizontal plane mirror and a pin held 20 cm above the lens coincides with its image. Now the space between the and the mirror is filled with a liquid in order to coicide with the image the pin has to be raised by 5 cm. The refractive index of the liquid is

A2Z-GEOMETRICAL OPTICS-Refraction At Curved Surface
  1. Two lenses of power +12 and -2 diopters are placed in contact. The com...

    Text Solution

    |

  2. A convex lens of focal length 40 cm is in contact with a concave lens ...

    Text Solution

    |

  3. A convex lens of focal length 40 cm is in contact with a concave lens ...

    Text Solution

    |

  4. If the space between the lenses in the lens combination shown were fil...

    Text Solution

    |

  5. A convex lens is placed in contact with a mirror as shown. If he space...

    Text Solution

    |

  6. A convex lens if in contact with concave lens. The magnitude of the ra...

    Text Solution

    |

  7. A thin glass (refractive index 1.5) lens has optical power of -5D in a...

    Text Solution

    |

  8. The plane faces of two identical planoconvex lenses each having focal ...

    Text Solution

    |

  9. If two lenses of +5 dioptres are mounted at some distance apart, the e...

    Text Solution

    |

  10. Consider an equiconvex lens of radius of curvature R and focal length ...

    Text Solution

    |

  11. A car is fitted with a convex side-view mirror of focal length 20 cm. ...

    Text Solution

    |

  12. A car is fitted with a convex side-view mirror of focal length 20 cm. ...

    Text Solution

    |

  13. A car is fitted with a convex side-view mirror of focal length 20 cm. ...

    Text Solution

    |

  14. A convex lens of focal length f produces a virtual image n times the s...

    Text Solution

    |

  15. An object is placed 30 cm to the left of a diverging lens whose focal...

    Text Solution

    |

  16. A lens forms a real image of an object. The distance from the object t...

    Text Solution

    |

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

    Text Solution

    |

  18. Which one of the following spherical lenses does not exhibit dispersio...

    Text Solution

    |

  19. A student measures the focal length of a convex lens by putting an obj...

    Text Solution

    |

  20. For a convex lens, if real image is formed the graph between (u+v) and...

    Text Solution

    |