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A real image can be captured on a screen (eg white paper) whereas a virtual image cannot.

To see an image on a screen light rays must come to a focus on the screen, but with a virtual image no actual light rays come together at the location of the image .. hence a virtual image cannot be seen on a screen.

A real image is a source of light energy .. rays of light radiate from it.
A virtual image is not a source of light energy.. rays of light do not radiate from it ( although it's where the brain 'thinks' the light originated.)

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Q: Difference between real and virtual focus?
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