Home
Class 11
PHYSICS
Two convex lenses of focal lengths f(1)a...

Two convex lenses of focal lengths `f_(1)andf_(2)` form images with magnification `m_(1)andm_(2)`, when used individually for an object kept at the same distance from the lenses. Then `f_(1)//f_(2)` is

A

`frac(m_1(1 + m_1))(m_2 (1 + m_2)`

B

`frac(m_1(1 + m_2))(m_2 (1 + m_1)`

C

`frac(m_2(1 + m_1))(m_1 (1 + m_2)`

D

`frac(m_2(1 + m_2))(m_1 (1 + m_1)`

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

  • Motion in a plane

    TARGET PUBLICATION|Exercise Exercise|340 Videos

  • RAY OPTICS

    TARGET PUBLICATION|Exercise EVALUATION TEST|16 Videos

Similar Questions

Explore conceptually related problems

Two thin lenses of focal lengths f_(1) and f_(2) are in contact. The focal length of this combination is

An object is placed at a distance of f//2 from a convex lens. The image will be

A telescope using an eye piece of focal length 2 cm has a magnification 20 in normal adjustment. If the telescope is now used to view an object placed at a distance of 2 m from the objective, the new length of the telescope is (assume final image is at infinity).

Two convex lenses of focal length f_1 and f_2 are mounted coaxially separated by a distance. If the power of the combination is zero, the distance between the lenses is

Answer the following questions : If two lenses of focal length f_1 and f_2 are kept in contact with each other , state the formula for the focal length of the combination . If p_1 and P_2 are the power of these lenses, state the formula for the power of the combination .

When two or more lnses of magnification m_(1) ,m_(2), m_(3) are kept in contact, the total magnification (m) produced is given by

A convex lens of focal length f produces a real image 3 times as that of size of the object, the distance between the object and the lens is

A convex mirror has a focal length of 18cm. The image of an object kept in front of the mirror is half the height of the object. What is the distance of the object from the mirror?

Two similar thin equiconvex lenses, of focal length f each, are kept coaxially in contact with each other such that the focal length of the combination is F_1 . When the space between the two lenses is filled with glycerin (which has the same refractive index (mu = 1.5) as that of glass) then the equivalent focal length is f_2 . The ratio F_1 : F_2 will be:

An object is located 4 m from the first of two thin converging lenses of focal lengths 2 m and T m respectively. The lenses are separated by 3 m. The final image formed by the second lens is located from the source at a distance of

TARGET PUBLICATION-OPTICS-EXERCISE
  1. An object is located 4 m from the first of two thin converging lenses ...

    Text Solution

    |

  2. A person can see clearly objects only when they lie between 50 cm and ...

    Text Solution

    |

  3. Two convex lenses of focal lengths f(1)andf(2) form images with magnif...

    Text Solution

    |

  4. The equiconvex lens has focal length f. If is cut perpendicular to the...

    Text Solution

    |

  5. A plano-convex lens is made of material having refractive index 1.5. T...

    Text Solution

    |

  6. A convex lens (with material of refractive index of 3/2) has two surfa...

    Text Solution

    |

  7. A double convex lens has focal length 25 cm. The radius of curvature o...

    Text Solution

    |

  8. The power of a biconvex lens is 10 dioptre and the radius of curvature...

    Text Solution

    |

  9. A convex lens of glass (mu=1.5) has a focal length of 8 cm when placed...

    Text Solution

    |

  10. A convex lens of glass (mu(g)=1.45) has focal length f(g) is air. The ...

    Text Solution

    |

  11. A thin convex lens made from crown glass (mu=(3)/(2)) has focal f. Whe...

    Text Solution

    |

  12. Two similar thin equiconvex lenses, of focal length f each, are kept c...

    Text Solution

    |

  13. Two identical thin plano-convex glass lenses (refractive index 1.5) ea...

    Text Solution

    |

  14. A plnao=convex lens fits exactly into a plano-concave lens. Their plan...

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

  20. Two convex lenses of focal lengths f(1)andf(2) are separated co-axiall...

    Text Solution

    |