Home
Class 12
PHYSICS
A thin glass (refractive index 1.5) lens...

A thin glass (refractive index 1.5) lens has optical power of `-5D` in air. Its optical power in a liquid medium with refractive index 1.6 will be

A

25 D

B

`"- 25 "`D

C

1 D

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
D
`(f_(1))/(f_(a)) = ((n_(ga) - 1))/((n_(gl) -1)) = (1.5 - 1)/((1.5)/(1.6) -1)`
`rArr P_(l) = (-5)/(8) " " (because P_(a) = - 5D).`
Promotional Banner

Topper's Solved these Questions

  • RAY OPTICS

    ERRORLESS|Exercise NCERT BASED QUESTIONS ( Prism Theory & Dispersion of Light )|46 Videos

  • RAY OPTICS

    ERRORLESS|Exercise NCERT BASED QUESTIONS ( Human Eye and Lens Camera )|15 Videos

  • RAY OPTICS

    ERRORLESS|Exercise NCERT BASED QUESTIONS ( Total internal reflection )|26 Videos

  • MAGNETISM

    ERRORLESS|Exercise Assertion and Reason|22 Videos

  • WAVE OPTICS AND ELECTROMAGNETIC THEORY

    ERRORLESS|Exercise ASSERTION & REASON |27 Videos

Similar Questions

Explore conceptually related problems

A thin glass (refractive index 1.5 ) lens has optical power of -8D in air, its optical power in a liquid medium with refractive index 1.6 will be

A biconvex lens of refractive index "1.5" has a focal length of "20cm" in air.Its focal length when immersed in a liquid of refractive index "1.6" will be:

A thin lens of refractive index 1.5 has focal length of 15 cm in air. When the lens is placed is a medium of refractive index (4)/(3), its focal length will become …..cm.

A thin convex lens made of glass of refractive index 3//2 has a power of 5 D. When it is immersed in a liquid of refractive index mu , it behaves like a divergent lens of focal length 1 m. Calculate the refractive index of the liquid.

A thin convex lens of refractive index 1.5cm has 20cm focal length in air. If the lens in completely immersed in a liquid of refractive index. 1.6, then its focal length will be

An equiconvex lens of refractive index 1.6 has power 4D in air. Its power in water is:

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

ERRORLESS-RAY OPTICS-NCERT BASED QUESTIONS ( Refraction at Curved surface )
  1. Let f(v) and f(r) are the focal lengths of a convex lens for violet an...

    Text Solution

    |

  2. A thin equi-convex lens is made of glass of refractive index 1.5 and i...

    Text Solution

    |

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

    Text Solution

    |

  4. A plano – convex lens made of material of refractive index mu with rad...

    Text Solution

    |

  5. A narrow parallel beam of light falls on a glass sphere of radius R an...

    Text Solution

    |

  6. The flat face of a plano-convex lens of focal length 10 cm is silvered...

    Text Solution

    |

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

    Text Solution

    |

  8. A parallel beam of light is incident on a converging lens parallel to ...

    Text Solution

    |

  9. A convex lens of focal length f produces an image (1)/(n) times than ...

    Text Solution

    |

  10. The sun makes 0.5^(@) angle on earth surface. Its image is made by con...

    Text Solution

    |

  11. A convex lens of focal length f is placed somewhere in between an obje...

    Text Solution

    |

  12. An object placed at a distance of 16 cm from a convex lens produces an...

    Text Solution

    |

  13. An object has image thrice of its original size when kept at 8 cm and ...

    Text Solution

    |

  14. A square card of side length 1 mm is being seen through a magnifying l...

    Text Solution

    |

  15. A point object O is placed on the principal axis of a convex lens of f...

    Text Solution

    |

  16. Two point light sources are 24 cm apart. Where should a convex lens of...

    Text Solution

    |

  17. A thin lens focal length f(1) and its aperture has diameter d. It form...

    Text Solution

    |

  18. A light source is located at P(1) as shown in the figure. All sides o...

    Text Solution

    |

  19. A plano convex lens has focal length f = 20 cm. If its plane surface i...

    Text Solution

    |

  20. Two thin lenses of focal length f(1) and f(2) are in contact and coaxi...

    Text Solution

    |