Home
Class 10
PHYSICS
A person got his eyes tested by an optio...

A person got his eyes tested by an option. The prescription for the spectacle lenses to be made reads:
Left eye: `+2.50`D Right eye: `+2.00` D
a) State whether these lenses are thicker in the middle or at the edges.
b) Which lens bends the light rays more strongly?
c) State whether these spectacle lenses will converge light rays or diverge light rays.

Text Solution

Verified by Experts

a) Thicker In the middle b) Lens having greater power of `+2.50 D`
c) Converging light rays.
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

Which type of lenses are: a) Thinner in the middle than at the edges? b) thicker in the middle than at the edges?

The optical prescription for a pair of spectacles is: Right eye: -3.50 D Left eye: -4.00 D a) Are these lenses thinner at the middle or at the edges? b) Which lens has a greater focal length? c) What is the weaker eye?

Name two parts of the eye which refract light rays (or bend light rays).

A lens which is thicker in the middle and thinner at the edges is called a ________ lens.

Which of the following lenses will bend the light rays through largest angle?

A lens which is thinner at the middle and thicker at the edges is called a ______ lens.

Eye lenses are manufactured by:

After testing the eye of a child, the optician has prescribed the following lenses for his spectacles : Left eye : + 2.00 D " " Right eye : + 2.25 D The child is suffering from the defect of vision called :

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

    |