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Question 6

What is a virtual image? Give one situation where a virtual image is formed.

Answer

Virtual Image: Virtual image cannot be obtain on screen. A virtual image can be seen only by looking into a mirror. The image of our body formed by a plane mirror cannot be received on a screen, it can be seen only looking into the mirror. The virtual image is just an illusion. So, virtual images are also called unreal images. A virtual image is formed when light rays coming from an object appear to meet after reflection from the mirror. It is possible to obtain a virtual image on the screen because light rays actually do not pass through it. A plane mirror always forms virtual images. Highly polished metal objects also forms virtual images.



We cannot find any image on the white screen which is placed behind the mirror, when an object is placed very close to the concave mirror. A virtual image is formed when reflected rays appear to meet.

 Such images cannot be obtained on screen.
 Plane mirrors, convex mirror and concave lens always forms an virtual image.

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