Home
Class 12
PHYSICS
A convex lens if in contact with concave...

A convex lens if in contact with concave lens. The magnitude of the ratio of their focal length is `(2)/(3)`. Their equivalent focal length is 30 cm. What are their individual focal lengths?

A

`-75 ,50`

B

`-10,15`

C

`75,50`

D

`-15,10`

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

  • NTA NEET TEST 64

    NTA MOCK TESTS|Exercise PHYSICS|45 Videos

  • NTA NEET TEST 80

    NTA MOCK TESTS|Exercise PHYSICS|45 Videos

Similar Questions

Explore conceptually related problems

A convex lens is in contact with a concave lens. The magnitude of the ratio of their powers is (3)/(2) . Their equivalent focal length is 30 cm. What are their individual focal lengths?

A convex lens of focal length 'f' is placed in contact with a concave lens of the same focal length. The equivalent focal length of the combination is

When a thin convex lens is put in contact with a thin concave lens of the same focal length (f), then the resultant combination has focal length equal to

A thin convex lens of focal length 10 cm is placed in contact with a concave lens of same material and of same focal length. The focal length of combination will be

A convex lens of power +2.5 D is in contact with a concave lens of focal length 25 cm. The power of combination is

A convex lens of focal length 10cm and concave lens of focal length 20 cm are kept 5 cm apart. The focal length of the equivalent lens is

NTA MOCK TESTS-NTA NEET TEST 79-PHYSICS
  1. A radioactive element decays by beta- emission. If mass of parent and ...

    Text Solution

    |

  2. A particle is subjected to two simple harmonic motion along x and y-di...

    Text Solution

    |

  3. One end of a long mettalic wire of length L is tied to the ceiling. T...

    Text Solution

    |

  4. Given that a photon of light of wavelength 10,000A has an energy equal...

    Text Solution

    |

  5. Light of wavelength 488 nm is produced by an argon laser which is used...

    Text Solution

    |

  6. A drop of mercury of radius 2 mm is split into 8 identical droplets. F...

    Text Solution

    |

  7. Mercury is completely filled in a rectangular take of height 72 cm. Th...

    Text Solution

    |

  8. A convex lens if in contact with concave lens. The magnitude of the ra...

    Text Solution

    |

  9. A glass prism of refractive index 1.5 is immersed in water (refractive...

    Text Solution

    |

  10. A solid sphere of mass M and radius R having tmoment of inertia I abou...

    Text Solution

    |

  11. A ring mass m and radius R has three particle attached to the ring as ...

    Text Solution

    |

  12. Which of the following statements is not true ?

    Text Solution

    |

  13. Select the outputs Y of the combination of gates shown below for input...

    Text Solution

    |

  14. The coefficient of apparent expansion of a liquid when determined usin...

    Text Solution

    |

  15. Density of a liquid in CGS system is 0.625(g)/(cm^3). What is its magn...

    Text Solution

    |

  16. In YDSE intensity at central maxima is I0 The ratio I/I0, at path di...

    Text Solution

    |

  17. Unpolarized light of intensity I(0) is incident on surface of a block ...

    Text Solution

    |

  18. A closed organ pipe and an open organ pipe of same length produce 2bea...

    Text Solution

    |

  19. A tuning fork of frequency 480 Hz produces 10 beats per second when so...

    Text Solution

    |

  20. A 0.5kg block slides from the point A on a horizontal track with an in...

    Text Solution

    |