Home
Class 12
PHYSICS
A lens with a focal length of 16 cm prod...

A lens with a focal length of `16 cm` produces a sharp image of an object in two positions, which are `60 cm` apart. Find the distance from the object to the screen.

Text Solution

Verified by Experts

The correct Answer is:
A, C
`f=(d^2-x^2)/(4d)` (displacement method)
`f=16 cm,x=60 cm`
Substituting the values we get,
`d=100cm`
Promotional Banner

Topper's Solved these Questions

  • REFRACTION OF LIGHT

    DC PANDEY|Exercise Subjective Questions|8 Videos

  • REFRACTION OF LIGHT

    DC PANDEY|Exercise Level 2 Single Correct|41 Videos

  • REFRACTION OF LIGHT

    DC PANDEY|Exercise Objective Questions|1 Videos

  • REFLECTION OF LIGHT

    DC PANDEY|Exercise Subjective|9 Videos

  • SEMICONDUCTORS

    DC PANDEY|Exercise Subjective|12 Videos

Similar Questions

Explore conceptually related problems

(a) A screen is kept at a distance of 1m from the object. A converging lens between the object and the screen, when placed at any of the two positions which are 60cm apart, forms a sharp image of the object on the screen. Find the focal length of the lens. (b) In the two positions of the lens, lateral size of the image is 4cm and 9cm. Find the size of the object.

A thin converging lens with focal length f = 25 cm projects the image of an object on a screen removed from the lens by a distance l == 5.0 m . Then the screen was draws closer to the lens by a distance Delta l = 18 cm . By what distance should the object be shifted for its image to become sharp again ?

A thin converging lens of focal length f = 25 cm forms the image of an object on a screen placed at a distance of 75 cm from the lens. Now the screen in moved closer to the lens by a distance of 25 cm. The distance through which the object has to be shifted so that its image on the screen is sharp again is

A convex lens of focal length 30 cm produces 5 times magnified real image of an object. What is the object distance?

A convex lens is coaxially placed with a concave lens. A screen is placed at a distance of 100 cm apart from the combination. The focal length of convex lens is 15 cm. Determine the focal length of the concave lens if image of object placed at a distance of 20 cm, from the combination, is projected on the scrcen.

Determine the position of the image produced by an optical system consisting of a concave mirror with a focal length of 10 cm and a convergent lens with a focal length of 20 cm. The distance from the mirror to the lens is 30 cm and from the lens to the object is 40 cm. Consider only two steps. Plot the image.

A convex lens when placed in the first position forms a real image of an object on a fixed screen. The distance between the object and the screen is 75 cm. On displacing the lens from first position by 25 cm to the second position, again a real image is formed on the screen. Then the focal length of the lens is

The focal length of convex lens is 20 cm. If an object of height 4 cm is placed at a distance of 30 cm from the lens, find: The position of the image

DC PANDEY-REFRACTION OF LIGHT-Level 1 Subjective
  1. A glass sphere with 10 cm radius has a 5 cm radius spherical hole at i...

    Text Solution

    |

  2. A glass sphere has radius of 5.0 cm and a refractive index of 1.6. A p...

    Text Solution

    |

  3. A fish is rising up veritcally inside a pond with velocity 4 m//s, and...

    Text Solution

    |

  4. A lens with a focal length of 16 cm produces a sharp image of an objec...

    Text Solution

    |

  5. Two glasses with refractive indices of 1.5 and 1.7 are used to make tw...

    Text Solution

    |

  6. A converging beam of rays in incident on a diverging lens. Having pass...

    Text Solution

    |

  7. A parallel beam of rays is incident on a convergent lens with a focal ...

    Text Solution

    |

  8. An optical system consists of two convergent lenses with focal length ...

    Text Solution

    |

  9. Determine the position of the image produced by an optical system cons...

    Text Solution

    |

  10. A parallel beam of rays is incident on a consisting pf three thin lens...

    Text Solution

    |

  11. A ray of light travelling in glass (mug=3//2) is incident on a horizon...

    Text Solution

    |

  12. A ray of light is incident on the left vertical face of glass cube of ...

    Text Solution

    |

  13. Light is incident from glass (mug=3/2) to water (muw=4/3). Find the ra...

    Text Solution

    |

  14. The angle of minimum deviation for a glass prism with mu=sqrt3 equals ...

    Text Solution

    |

  15. A ray incident on the face of a prism is refracted and escape through ...

    Text Solution

    |

  16. In an equilateral prism of mu=1.5, the condition for minimum deviation...

    Text Solution

    |

  17. In a certain spectrum produced by a glass prism of dispersive power 0....

    Text Solution

    |

  18. An achromatic lens-doublet is formed by placing in contact a convex le...

    Text Solution

    |

  19. An achromatic convergent lens of focal length 150 cm is made by combin...

    Text Solution

    |

  20. The index of refraction of heavy flint glass is 1.68 at 434 nm and 1.6...

    Text Solution

    |