why does a concave lens always form a virtual image of an object??
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because the lights rays that emerge from a concave lens gets diverged... they do not meet actually, instead they appear to meet.
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Image formed by a concave lens: The rays falling on a concave lens, after refraction, always diverge. Therefore, no matter where the object is kept, a diverging lens always forms a virtual image, which is erect and smaller in size than the object. It is formed between the optical centre and the focus, on the same side of the lens as the object.
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