Home
Class 11
PHYSICS
Assertion : If radius of curvature of mi...

Assertion : If radius of curvature of mirror is doubled, focal length is halved.
Reason : Radius of curvature =2 times the focal lenghts

A

Assertion is True, Reason is True, Reason is a correct explanation for Assertion.

B

Assertion is True, Reason is True, Reason is not a correct explanation for Assertion.

C

Assertion is True, Reason is False.

D

Assertion is False, Reason is True.

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

  • Motion in a plane

    TARGET PUBLICATION|Exercise Exercise|340 Videos

  • RAY OPTICS

    TARGET PUBLICATION|Exercise EVALUATION TEST|16 Videos

Similar Questions

Explore conceptually related problems

Define the following: Radius of curvature ®

The radius of curvature of a plane wave front

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 relation between focal length f and radius of curvature R of a spherical mirror is.

Focal length, radius of curvature, image distance, size of image.

A double convex lens has focal length 25 cm. The radius of curvature of one of the surfaces is double of the other. Find the radii if the refractive index of the material of the lens is 1.5.

The convex surface of a thin concavo-convex lens of glass of refractive index 1.5 has radius of curvature 10 cm. The concave surface has a radius of curvature 30 cm. The convex side is silvered and placed on a horizontal surface. Then where should a pin be placed on the optic axis such that its image is formed at the same place?

Assertion : A double convex lens (mu=1.5) has focal length 10 cm . When the lens is immersed in water (mu=4//3) its focal length becomes 40 cm . Reason : (1)/(f)=(mu_(1)-mu_(m))/(mu_(m))((1)/(R_(1))-(1)/(R_(2)))

Derive the Lens Makers equation OR Derive lens makers' equation. Why is it called so? Under which conditions focal length f and radii of curvature R are numerically equal for a lens?

TARGET PUBLICATION-OPTICS-EXERCISE
  1. Assertion : If objective and eye lens of a mcroscope are interchanged ...

    Text Solution

    |

  2. A convex lens focal lenghts 30 cm made of glass of refractive index 1....

    Text Solution

    |

  3. Magnifying power of a telescope in normal adjustment when final images...

    Text Solution

    |

  4. Two plano-concave lenses (1 and 2) of glass of refractive index 1.5 ha...

    Text Solution

    |

  5. Assertion : If radius of curvature of mirror is doubled, focal length ...

    Text Solution

    |

  6. Assertion : A dentist uses a convex mirror to examine a small cavity i...

    Text Solution

    |

  7. For a given compound microscope, increase in length of tube

    Text Solution

    |

  8. A light ray enters a solid glass sphere of refractive index sqrt3 at a...

    Text Solution

    |

  9. A telescope using an eye piece of focal length 2 cm has a magnificatio...

    Text Solution

    |

  10. Which of the following (referred to a spherical mirror) do (does) not ...

    Text Solution

    |

  11. In optical fibre, assuming, the cladding is uniform, light is transmi...

    Text Solution

    |

  12. Light propagates 4 cm distance in glass of refractive index 1.5 in tim...

    Text Solution

    |

  13. A transparent solid cylindrical rod has a refractive index of (frac(2)...

    Text Solution

    |

  14. A beam of light consisting of red, and blue colours is incident on a r...

    Text Solution

    |

  15. A light ray is incident normally on the face AB of a right-angled pris...

    Text Solution

    |

  16. Diamond is optically more dense than water because

    Text Solution

    |

  17. Critical angle of glass is theta(1) and that of water is theta(2). The...

    Text Solution

    |

  18. The value of critical angle is least for which of the following colour...

    Text Solution

    |

  19. The angular dispersion produced by a small angle prism placed in air

    Text Solution

    |

  20. Assertion: The rainbow is seen sometimes in the sky when it is raining...

    Text Solution

    |