Home
Class 12
PHYSICS
A convex lens of glass has power P in ai...

A convex lens of glass has power P in air. If it is immersed in water its power will be

A

`gt P`

B

`lt P`

C

`P`

D

none

Text Solution

Verified by Experts

The correct Answer is:
B
Since focal length in water increases (as shown in question 9), hence power decreases.
Promotional Banner

Topper's Solved these Questions

  • REFRACTION AT SPHERICAL SURFACES

    CP SINGH|Exercise EXERCISES|105 Videos

  • REFLECTION OF LIGHT

    CP SINGH|Exercise EXERCISES|67 Videos

  • REFRACTION OF LIGHT BY PLANE SURFACES

    CP SINGH|Exercise Exercises|110 Videos

Similar Questions

Explore conceptually related problems

A convex lens of glass ( mu = 1.5) is immersed in water. Compared to its power in air, its power in water-

A convex lens (refractive index mu = 1.5) has a power P. If it is immersed in a liquid ( mu = 4/3), then its power will become/remain

Assertion : If a convex lens of glass is immersed in water its power decreases. Reason : In water it behaves as a concave lens.

The power of a thin convex lens of glass is 5 dioptre . When it is immersed in a liquid of refractive index mu , it behave like a diverging lens of focal length 1m . Calculate mu of liquid, if mu of glass = 3//2 .

The power of a lens kept in air is P. When it is immersed in water, then power becomes ( mu _(water) =4/3, mu_(Lens) = 3/2 )

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

A convex lens made of a glass of refractive index 3//2 has a focal length 'f' in air. If it is immersed into water of refractive index 4//3 , then with calculation, predict the new focal length of the lens inside water.

a lens of glass is immersed in water. How is power of lens affected ?

CP SINGH-REFRACTION AT SPHERICAL SURFACES-EXERCISES
  1. Focal length of a convex lense in air is 10cm. Find its focal length...

    Text Solution

    |

  2. The radius of curvature of the convex surface of a thin plano-convex l...

    Text Solution

    |

  3. A convex lens of glass has power P in air. If it is immersed in water ...

    Text Solution

    |

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

    Text Solution

    |

  5. In figure, an air lens of radius of curvature of each surface equal to...

    Text Solution

    |

  6. A thin convergent glass lens (mug=1.5) has a power of +5.0D. When this...

    Text Solution

    |

  7. A hollow double concave lens is made of very thin transparent material...

    Text Solution

    |

  8. The ray diagram could be correct

    Text Solution

    |

  9. A lens of refractive index n is put in a liquid of refractive index n'...

    Text Solution

    |

  10. A convex lens is dipped in a liquid whose refractive index is equal to...

    Text Solution

    |

  11. Four lenses are made from the same type of glass, the radius of curvat...

    Text Solution

    |

  12. An equi-convex glass lens with radius of each face as R is placed in a...

    Text Solution

    |

  13. In the above question if there is air in the object space and water in...

    Text Solution

    |

  14. A convex lens is made of 3 layers of glass of 3 different materials as...

    Text Solution

    |

  15. The focal length for violet, green and red light rays are fV,fG and fR...

    Text Solution

    |

  16. An equiconvex lens is cut into two halves along (i) XOX^(') and (ii) Y...

    Text Solution

    |

  17. If the central portion of a convex lens is wrapped in black paper as s...

    Text Solution

    |

  18. A convex forms a real image of a poinnt object placed on its principal...

    Text Solution

    |

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

    Text Solution

    |

  20. A convex lens is made up of three different materials as shown in the ...

    Text Solution

    |