Home
Class 12
PHYSICS
Assertion : The illuminance of an image ...

Assertion `:` The illuminance of an image produced by a convex lens is greater is the middle and less towards the edges.
Reason `:` The middle part of image is formed by undeflected rays while out part by inclined rays.

A

If both assertion and reason are true and reason is the correct explanation of assertion.

B

If both assertion and reason are true but reason is not the correct explanation of assertion.

C

If assertion is true but reason is false.

D

If assertion and reason both are false.

Text Solution

Verified by Experts

The correct Answer is:
A
Image formed by convex lens
Promotional Banner

Topper's Solved these Questions

  • GEOMETRICAL OPTICS

    A2Z|Exercise AIPMT/NEET Questions|95 Videos

  • GEOMETRICAL OPTICS

    A2Z|Exercise Assertion Reason|15 Videos

  • GEOMETRICAL OPTICS

    A2Z|Exercise Problems Based On Mixed Concepts|37 Videos

  • ELECTROMAGNETIC WAVES AND COMMUNICATION SYSTEM

    A2Z|Exercise Section D - Chapter End Test|30 Videos

  • MAGNETISM AND MATTER

    A2Z|Exercise Section D - Chapter End Test|30 Videos

Similar Questions

Explore conceptually related problems

What is the nature of the image formed by a convex lens if the magnification produced by the lens is +3 ?

What is the nature of the image formed by a convex lens if the magnification produced by the lens is, -0.5 ?

Assertion : The minimum distance between an object and its real image formed by a convex lens is 2f. Reason : The distance between an object and its real image is minimum when its magnification is - 1.

Assertion :- The minimum distance between a real object and its real image formed by a convex lens is 4f. Reason :- Convex mirror and concave lens form a virtual and erect image for all positions of the real object.

While looking at an image formed by a convex lens (one half of the lens is covered with a black paper), which one of the following will happen to the image?

Assertion: Minimum distance between object and its real image by a convex lens is 4f. Reason: If object distance from a convex lens is 2f, then its image distace is also 2f.

Assertion: Image of an object is of same size by a convex lens. If a glass slab is placed between object and lens, image will become magnified. Reason: By inserting the slab, image may be real or virtual.

Assertion:Image formed by concave lens is not always virtual. Reason:Image formed by a lens is real if the image is formed in the direction of ray of light with respect to the lens.

Draw ray diagram showing the image formation by a convex lens when an object is placed at the focus of the lens.

Write three characteristics of the image formed by a convex lens when the object is placed at a distance greater than twice the focal length of convex lens.

A2Z-GEOMETRICAL OPTICS-Section B - Assertion Reasoning
  1. Assertion: When an object is placed between two plane parallel mirrors...

    Text Solution

    |

  2. Assertion : The size of the mirror affect the nature of the image. ...

    Text Solution

    |

  3. Assertion : Just before setting, the sun may appear to be elliptical. ...

    Text Solution

    |

  4. Assertion : Critical angle of light passing from glass to air is minim...

    Text Solution

    |

  5. Assertion : A piece of red glass is heated till it glows in dark. The ...

    Text Solution

    |

  6. Assertion : Within a glass slab, a double convex air bubble is formed....

    Text Solution

    |

  7. Assertion : The images formed by total internal reflections are much b...

    Text Solution

    |

  8. Assertion : The focal length of the lens does not change when red ligh...

    Text Solution

    |

  9. Assertion : There is no dispersion of light refracted through a rectan...

    Text Solution

    |

  10. Assertion : All the materials always have the same colour, whether vie...

    Text Solution

    |

  11. Assertions : A beam of white light give a spectrum on passing through ...

    Text Solution

    |

  12. Assertion : By increasing the diameter of the objective of telescope,...

    Text Solution

    |

  13. Assertion : If objective and eye lenses of a microscope are interchang...

    Text Solution

    |

  14. Assertion : The illuminance of an image produced by a convex lens is g...

    Text Solution

    |

  15. Assertion : Although the surfaces of a goggle lens are curved, it does...

    Text Solution

    |

  16. Assertion : If the angles of the base of the prism are equal, then in ...

    Text Solution

    |

  17. Assertion : Dispersion of light occurs because velocity of light in a ...

    Text Solution

    |

  18. Assertion : An empty test tube dipped into water in a beaker appears s...

    Text Solution

    |

  19. Assertion : Spherical aberration occur in lenses of larger aperture. ...

    Text Solution

    |