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A concave mirror forms the image of an o...

A concave mirror forms the image of an object on a screen. If the lower half of the mirror is covered with an opaque card, the effect would be

A

to make the image less bright

B

to make the lower half of the image

C

to make the upper half of the image disappear.

D

to make the image blurred

Text Solution

Verified by Experts

The correct Answer is:
A
The complete image is formed but intensity of image will decrease.
intensity`prop`(area of mirror reflecting the light).
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CP SINGH-REFLECTION OF LIGHT-EXERCISES
  1. An object 1cm tall is placed 4cm in front of a mirrorr. In order to pr...

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  2. A spherical mirror forms an erect image three times the size of the ob...

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  3. A concave mirror forms the image of an object on a screen. If the lowe...

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  4. An object is placed at 20 cm from a convex mirror of focal length 20 c...

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  5. An obejct is placed at a distance 2f from the pole of a convex mirror ...

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  6. An object is placed in from of a convex mirror of focal length 50 cm, ...

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  7. A concave mirror has focal length 15 cm. Where should an object be pla...

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  8. The image of an object placed on the principal axis of a concave mirro...

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  9. In a concave mirror, an object is placed at a distance d1 from the foc...

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  10. A square wire of side 3.0 cm is placed 25 cm away from a concave mirro...

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  11. For a concave mirror the magnificant of a real image was found to be t...

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  12. A concave mirror forms a real image three times larger than the object...

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  13. The sun subtends an angle half a degree at the pole of a concave mirro...

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  14. A thin rod of length (f/3) is lying along the principal axis of a conc...

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  15. A short linear object of length b lies along the axis of a concave mir...

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  16. A piece of wire bent into an L shape with upright and horizontal porti...

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  17. A cube of side 2m is placed in front of a concave mirrorr of focal len...

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  18. The firld of view is maximum for

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  19. A convex mirror of length 1m and a plane mirror are facing each other,...

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  20. An object is placed in front of a convex mirror at a distance of 50cm....

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