Home
Class 11
PHYSICS
A beam of parallel rays is brought to fo...

A beam of parallel rays is brought to focus by a planoconvex lens. A thin Concave lens of the same focal length is joined to the first lens. The effect of this is

A

focal point shifts away from the lens by a small distance.

B

focus remains undisturbed.

C

focus shifts to infinity.

D

focal point shifs towards the lens by a small distance.

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • RAY OPTICS

    TARGET PUBLICATION|Exercise EVALUATION TEST|16 Videos
  • RAY OPTICS

    TARGET PUBLICATION|Exercise CRITICALTHINKING|38 Videos
  • OPTICS

    TARGET PUBLICATION|Exercise EXERCISE|447 Videos
  • REFRACTION OF LIGHT

    TARGET PUBLICATION|Exercise EVALUATION TEST|15 Videos

Similar Questions

Explore conceptually related problems

Concave lens:Negative focal length:: Convex lens:____.

If the focal length of the objective lens is increased then

The focal length of a lens depends on

The power of convex lens of focal length 50 cm is______

The problem of myopia is corrected by using convex lens of suitable focal length.

Calculate the power of convex lens of focal length 15 cm.

Find the power of a convex lens of focal length 12.5 cm.

Find the power of a convex lens of focal length 40 cm.

Consider a point at the focal point of a convergent lens. Another convergent lens of short focal length is placed on the other side. What is the nature of the wavefronts emerging from the final image?

Principal focus of concave lens:

TARGET PUBLICATION-RAY OPTICS-COMPETITIVE THINKING
  1. Calculate the focal length of a reading glass of a person, if the dist...

    Text Solution

    |

  2. An object is located 4 m from the first of two thin converging lenses ...

    Text Solution

    |

  3. A beam of parallel rays is brought to focus by a planoconvex lens. A t...

    Text Solution

    |

  4. A plano-convex lens fits exactly into a plano-concave lens. Their plan...

    Text Solution

    |

  5. A plano-convex lens fits exactly into plano-concave lens as shown in t...

    Text Solution

    |

  6. Two lenses of power +12 and -2 dioptres are placed in contact. The com...

    Text Solution

    |

  7. A comvex lens and a concave lens are placed in contact. The ratio of m...

    Text Solution

    |

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

    Text Solution

    |

  9. Two identical equiconvex lenses, each of focal length 'f' are placed s...

    Text Solution

    |

  10. A bi-convex lens is formed with two thin plano convex lenses as shown ...

    Text Solution

    |

  11. Two convex lenses of focal length f1 and f2 are mounted coaxially sepa...

    Text Solution

    |

  12. A diverging lens with magnitude of focal length 25 cm is placed at a d...

    Text Solution

    |

  13. A convex lens of focal length 12.5 cm is used as a simple microscope. ...

    Text Solution

    |

  14. Least distance of distinct vision is 25 cm . Magnifying power of simpl...

    Text Solution

    |

  15. In compound microscope, the focal length and aperture of the objective...

    Text Solution

    |

  16. In a compound microscope, the intermediate image is

    Text Solution

    |

  17. A compound micrscope consists of an objective of focal length 1.0 cm ...

    Text Solution

    |

  18. An obsever looks at a distant tree of height 10m with a telescope of m...

    Text Solution

    |

  19. An astronomical telescope has an angular magnification of magnitude 5 ...

    Text Solution

    |

  20. On which of the following does the magnifying power of a telescope dep...

    Text Solution

    |