Home
Class 12
PHYSICS
Assertion : A lens having larg aperture ...

Assertion : A lens having larg aperture will produce image of a point source not as a point but as a diffused bright spot. This error of optical system is called spherical aberration.
Reason : The paraxial rays of light from the image at a longer distance from the lens than marginal rays.

A

If both, Assertion and Reason are true and the Reason is the correct explaination of the Assertion.

B

If both, Assertion and Reason are true but Reason is not a correct explaination of the Assertion.

C

If Assertion is true but the Reason is false.

D

If both, Assertion and Reason are false.

Text Solution

Verified by Experts

The correct Answer is:
A
Both, the assertion and reason are correct and the latter is correct explaination of the former.
Promotional Banner

Topper's Solved these Questions

  • OPTICS

    PRADEEP|Exercise Problems for practice|4 Videos

  • OPTICS

    PRADEEP|Exercise Comprehension 1|1 Videos

  • OPTICS

    PRADEEP|Exercise Value based questions|3 Videos

  • MAGNETIC EFFECT OF CURRENT AND MAGNETISM

    PRADEEP|Exercise Competition Focus (Multiple Choice Questions)|2 Videos

Similar Questions

Explore conceptually related problems

Assertion L A spherical wavefront is produced by a point source of light . Reason : It is because, the locus of al points, which are equidistant from the point source, is a sphere.

Assertion : Spherical aberration occur in lenses of larger aperture. Reason : The two rays, paraxial and marginal rays focus at different points.

Consider the rays shown in figure, as paraxial. The image of the virtual point object O formed by the lens LL is

Assertion : If two rays start from a point along different paths and then meet again at some point then this point is called real image. Reason: Convex mirror can never form a real image.

A point source of light is moving at a rate of 2 cm-s^(-1) towards a thin convex lens of focal length 10 cm along its optical axis. When the source is 15 cm away from the lens the image is moving at -

A thin lens produces an upright image of the same size as the object. Then from the optical centre of the lens, the distance of the object is .

The inner surface of the wall of a sphere is perfectly reflecting. Radius of the sphere is R. A point source S is placed at a distance R//2 from the centre of the sphere. Consider the reflection of light from the farthest wall followed by reflection from the nearest wall. Where is the image of the source? Consider paraxial rays only.

PRADEEP-OPTICS-Exercise
  1. Assertion : Colours can be seen in thin layers of oil on the surface o...

    Text Solution

    |

  2. Assertion : No diffraction is produced in sound waves near a very smal...

    Text Solution

    |

  3. Assertion : A lens having larg aperture will produce image of a point ...

    Text Solution

    |

  4. Assertion : Light shows the phenomena of interference, diffrection and...

    Text Solution

    |

  5. Assertion : Universe is expanding. Reason : The result is based on r...

    Text Solution

    |

  6. Assertion : All bright interference bands have same intensity. Reaso...

    Text Solution

    |

  7. Assertion : The frequencies of incident, reflected and refracted beam ...

    Text Solution

    |

  8. Assertion : A normal human eye can clearly see all the objects beyond ...

    Text Solution

    |

  9. Assertion : The sun lookes bigger in size at sunrise and sunset than d...

    Text Solution

    |

  10. Statement-1 : The rainbow is seen sometimes in the sky when it is rain...

    Text Solution

    |

  11. Statement-1 : A single lens produces a coloured image of an object ill...

    Text Solution

    |

  12. Statement-1 : Raman spectrum of a liquid contains lines, whose wavelen...

    Text Solution

    |

  13. Statement-1 : it is impossible to photograph a virtual image. Statem...

    Text Solution

    |

  14. Statement-1 : If a convex lens is kept in water, its convergent power ...

    Text Solution

    |

  15. Statement-1 : A dentist uses a concave mirror to examine a small cavit...

    Text Solution

    |

  16. Statement-1 : The refractive index of a prism depends only on the kind...

    Text Solution

    |

  17. Statement-1 : A ray of light incident normally on a refracting surface...

    Text Solution

    |

  18. Statement-1 : Light travels faster in glass than in air. Statement-2...

    Text Solution

    |

  19. Statement-1 : Energy is created during constructive interference and i...

    Text Solution

    |

  20. Statement-1 : When a prism of mu = 3//2 is immersed in water (mu = 4//...

    Text Solution

    |