Home
Class 10
PHYSICS
The power of a lens is +2.0D. Its focal ...

The power of a lens is `+2.0`D. Its focal length should be:

A

100 cm

B

50 cm

C

25 cm

D

40 cm

Text Solution

Verified by Experts

The correct Answer is:
B
b
Promotional Banner

Topper's Solved these Questions

  • REFRACTION OF LIGHT

    LAKHMIR SINGH & MANJIT KAUR|Exercise LONG ANSWER TYPE QUESTIONS|3 Videos

  • REFRACTION OF LIGHT

    LAKHMIR SINGH & MANJIT KAUR|Exercise SHORT ANSWER TYPE QUESTIONS|1 Videos

  • REFRACTION OF LIGHT

    LAKHMIR SINGH & MANJIT KAUR|Exercise VERY SHORT ANSWER TYPE QUESTIONS|1 Videos

  • REFLECTION OF LIGHT

    LAKHMIR SINGH & MANJIT KAUR|Exercise Very Short Answer Type Questions|1 Videos

  • SOURCES OF ENERGY

    LAKHMIR SINGH & MANJIT KAUR|Exercise NCERT|8 Videos

Similar Questions

Explore conceptually related problems

If the power of a lens is 0.1 D, its focal length is

Power of the lens is -40 ,its focal length is

If the power of a lens is 2 D, its focal length =0.5 m.

The power of lens is 2.5 D . What is its focal length ?

LAKHMIR SINGH & MANJIT KAUR-REFRACTION OF LIGHT-Exercise
  1. The focal length of a lens is +150mm. What kind of lens is it and what...

    Text Solution

    |

  2. Fill in the following blanks with suitable words: a) The reciprocal ...

    Text Solution

    |

  3. An object of height 4 cm is placed at a distance of 15 cm in front of ...

    Text Solution

    |

  4. An object of height 4.25 mm is placed at a distance 10 cm from a conve...

    Text Solution

    |

  5. A convex lens of power 5 D and a concave lens of power 7.5 D are place...

    Text Solution

    |

  6. A convex lens of focal length 25 cm and a concave lens of focal length...

    Text Solution

    |

  7. The power of a combination of two lenses X and Y is 5 D. If the focal ...

    Text Solution

    |

  8. Two lenses A and B have focal length of +20 cm and, -10 cm, respective...

    Text Solution

    |

  9. a) What do you understand by the power of a lens? Name one factor on w...

    Text Solution

    |

  10. a) Two lenses A and B have power of i) +2D and ii) -4 D respectively. ...

    Text Solution

    |

  11. The focal lengths of four convex lens P,Q, R and S are 20cm, 15 cm, 5 ...

    Text Solution

    |

  12. A converging lens has a focal length of 50cm. The power of this lens i...

    Text Solution

    |

  13. A diverging lens has a focal length of 0.10m. The power of this lens w...

    Text Solution

    |

  14. The power of a lens is +2.0D. Its focal length should be:

    Text Solution

    |

  15. If a spherical lens has a power of, -0.25 D, the focal length of this ...

    Text Solution

    |

  16. The power of a concave lens is 10 D and that of a convex lens is 6 D. ...

    Text Solution

    |

  17. The power of a converging lens is 4.5 D and that of a diverging lens i...

    Text Solution

    |

  18. A convex lens of focal length 10 cm is placed in contact with a concav...

    Text Solution

    |

  19. The optical prescription for a pair of spectacles is: Right eye: -3....

    Text Solution

    |

  20. A person got his eyes tested by an option. The prescription for the sp...

    Text Solution

    |