Home
Class 11
PHYSICS
A convex lens of glass (mu(g)=1.45) has ...

A convex lens of glass `(mu_(g)=1.45)` has focal length `f_(g)` is air. The lens is immersed in a liquid of refractive index `(mu_(g))` 1.3. The ratio of the `f_(liquid)//f_(g)` is

A

`3.9`

B

`0.23`

C

`0.43`

D

`0.39`

Text Solution

Verified by Experts

The correct Answer is:
A
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

A thin convex lens made from crown glass (mu=(3)/(2)) has focal length f. When it is measured in two different liquids having refractive indices (4)/(3) and (5)/(3) , it has the focal lengths f_1 and f_2 respectively . The correct relation between the focal lengths is ,

A convex glass lens (mu_(g) = 1.5) has a focal length of 8 cm when placed in air. What is the focal length of the lens when it is immersed in water ? (mu_(omega) = (4)/(3))

The power of a thin convex lens (""_(a) mu_(g)=1.5) is +5.0 D . When it is placed in liquid of refractive index ""_(a) mu_(l) then it behaves as a concavelens of focal length 100 cm. the refractive index of liquid ""_(a) mu_(i) will be

Convex lens made up of glass (mu_(g)=1.5) and radius of curvature R is dipped into water. Its focal length will be (Refractive index of water =4/3)

Assertion : A double convex lens (mu=1.5) has focal length 10 cm . When the lens is immersed in water (mu=4//3) its focal length becomes 40 cm . Reason : (1)/(f)=(mu_(1)-mu_(m))/(mu_(m))((1)/(R_(1))-(1)/(R_(2)))

A concave lens of glass, refractive index 1.5 has both surfaces of same radius of curvature R. On immersion in a medium of refractive index 1.75, it will behave as a

A convex lens focal lenghts 30 cm made of glass of refractive index 1.5 is immersed in water having refrctive 1.33 . The change in the focal length of lens is

A plano-convex lens has focal length of 20 cm. the radius of its spherical suface is (""_(a) mu_(g)=1.5)

A concave mirror of focal length f (in air) is immersed in water (mu=4//3) . The focal length of the mirror in water will be

A double convex lens has focal length 25 cm. The radius of curvature of one of the surfaces is double of the other. Find the radii if the refractive index of the material of the lens is 1.5.

TARGET PUBLICATION-RAY OPTICS-COMPETITIVE THINKING
  1. An astronomical telesope has objective and eyepiece of focal lengths 4...

    Text Solution

    |

  2. A telescope using an eye piece of focal length 3 cm has a magnificatio...

    Text Solution

    |

  3. In an astronomical telescope in normal adjustment a straight black lin...

    Text Solution

    |

  4. The ratio of the diameter of the sun to the distance between the earth...

    Text Solution

    |

  5. A point object is held above a thin equiconvex lens at its focus. The ...

    Text Solution

    |

  6. A concave lens of glass, refractive index 1.5 has both surfaces of sam...

    Text Solution

    |

  7. Given a point source of light, which of the following can produce a pa...

    Text Solution

    |

  8. choose the correct option

    Text Solution

    |

  9. An infinitely long bar lies alont the adis of cancave mirror of focal...

    Text Solution

    |

  10. Diameter of a plano-convex lens is 6cm and thickness at the centre is ...

    Text Solution

    |

  11. The image of an object, forme by a plano-convex lens at a distance of ...

    Text Solution

    |

  12. By placing a comvex lens of focal length equal to 15.0 cm between an o...

    Text Solution

    |

  13. For a normal eye, the cornea of eye provides a converging power of 40 ...

    Text Solution

    |

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

    Text Solution

    |

  15. The focal length of a plano-convex lens is f and its refractive index ...

    Text Solution

    |

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

    Text Solution

    |

  17. Convex lens is made of glass of refractive index 1.5 If the radius of ...

    Text Solution

    |

  18. Relative difference of focal lengths of objective and eye lens in the ...

    Text Solution

    |

  19. Three thin lenses are combined by placing them in contact with each ot...

    Text Solution

    |

  20. If the focal length of the objective lens is increased then

    Text Solution

    |