Home
Class 12
PHYSICS
In figure, an air lens of radius of curv...

In figure, an air lens of radius of curvature of each surface equal to `10 cm` is cut into a cylinder of glass of refractive index `1.5.` The focal length and the nature of lens are

A

`15 cm` diverging

B

`15 cm` converging

C

`10 cm` diverging

D

`10 cm` converging

Text Solution

Verified by Experts

The correct Answer is:
A
`1/f=(1/1.5-1)(1/10-1/-10)`
Solving, we get `f=-15 cm`
Promotional Banner

Topper's Solved these Questions

  • REFRACTION OF LIGHT

    DC PANDEY|Exercise Objective Questions|1 Videos

  • REFRACTION OF LIGHT

    DC PANDEY|Exercise Level 1 Subjective|29 Videos

  • REFRACTION OF LIGHT

    DC PANDEY|Exercise Level 1 Assertion And Reason|13 Videos

  • REFLECTION OF LIGHT

    DC PANDEY|Exercise Subjective|9 Videos

  • SEMICONDUCTORS

    DC PANDEY|Exercise Subjective|12 Videos

Similar Questions

Explore conceptually related problems

The radius of curvature of each surface of a biconcave lens made up of glass of refrative indx 1.5 is 30 cm. the focal length of the lens is

The radius of curvature for a convex lens is 40 cm , for each surface. Its refractive index is 1.5. The focal length will be

An equiconcave lens having radius of curvature of each surface 20 cm has one surface silvered. If the refractive index of the lens is 1.5, then the magnitude of the focal length is

The radius curvature of each surface of a convex lens of refractive index 1.5 is 40 cm. Calculate its power.

A diverging lens of focal length 10 cm having refractive index 1.5 is immersed in a liquid of refractive index 3. The focal length and nature of the lens in liquid is

If the radii of curvature of the two surfaces of a concave lens are 10 cm and 20 cm respectively and the refractive index is 1.5. What is its focal length ?

The radius of curvature of the convex face of a plano convex lens is 12cm and the refractive index of the material of the lends 1.5. Then, the focal length of the lens is

DC PANDEY-REFRACTION OF LIGHT-Level 1 Objective
  1. The refracting angle of a prism is A and refractive index of the mater...

    Text Solution

    |

  2. A prism of refractive index sqrt2 has refractive angle 60^@. In the or...

    Text Solution

    |

  3. The focal length of a combination of two lenses is doubled if the sep...

    Text Solution

    |

  4. A convexo-concave convergent lens is made of glass of refractive index...

    Text Solution

    |

  5. An optical system consists of a thin convex lens of focal length 30 cm...

    Text Solution

    |

  6. In the figure shown, the angle made by the light ray with the normal i...

    Text Solution

    |

  7. For refraction through a small angled prism, the angle of minimum devi...

    Text Solution

    |

  8. A ray of light passes from vaccum into a medium of refractive index n....

    Text Solution

    |

  9. A thin convex lens of focal length 30 cm is placed in front of a plane...

    Text Solution

    |

  10. One side of a glass slab is silvered as shown in the figure. A ray of ...

    Text Solution

    |

  11. A prism has refractive index sqrt((3)/(2)) and refractive angle 90^@. ...

    Text Solution

    |

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

    Text Solution

    |

  13. A point object is placed at a distance of 12 cm from a convex lens of ...

    Text Solution

    |

  14. An object, a convex lens of focal length 20 cm and a plane mirror are ...

    Text Solution

    |

  15. The prism shown in figure has a refractive index of 1.60 and the angle...

    Text Solution

    |

  16. A prism having refractive index sqrt2 and refractive angle 30^@ has on...

    Text Solution

    |

  17. The image for the converging beam after refraction through the curved ...

    Text Solution

    |

  18. A concavo-convex lens is made of glass of refractive index 1.5. The ra...

    Text Solution

    |

  19. From the figure shown, establish a relation between mu1,mu2,and mu3

    Text Solution

    |

  20. When light of wavelength lambda on an equilateral prism, kept on its m...

    Text Solution

    |