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A converging lens is udes to form an ima...

A converging lens is udes to form an image on a screen. When the upper half of the lens is covered by an opaque screen,

A

half the image will disappear

B

complete image will be formed

C

intensity of the image will increase

D

intensity of the image will decrease

Text Solution

Verified by Experts

The correct Answer is:
b.,d.
The image formed will be complete because light ray s from alll parts of the object will strike on the lower half. But since the upper half light rays are cut off, the intensity will reduce.
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A converging lens is used to form an image on a screen. When the upper half of the lens is covered by an opaque screen

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Knowledge Check

  • A converging lens is used to form an image on a screen. When the upper half of the lens is covered by an opaque screen. a) half of the image will disappear b) no part of image will disappear . c) Intensity of the image will increased d. Intensity of the image will decrease

    A
    a,c are true
    B
    a,d are true
    C
    b,c are true
    D
    b,d are true

  • A convex lens is used to form an image of an object on a screen. If the upper half of the lens is blackened so that it becomes opaque, then

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    only half of the image will be visible
    B
    the image position shifts towards the lens
    C
    the image position shifts away from the lens
    D
    the brightness of the image reduces

  • A convex lens is used to form image of an object on screen. When half of the lens is covered by painting black on it, then

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    Intensity of the image formed will remain same
    B
    Intensity of the image formed will decrease
    C
    Half of the image will be formed on the screen
    D
    Complete image will be formed on the screen

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