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which type of lens forms always a virtual image

Question:
Which type of lens forms always a virtual image?

Answer:

Virtual image is formed by the concave lens because in concave lens the refracted ray never converge. If the rays are not refracted then a virtual image is formed. Concave lens is used to correct short sightedness.

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Which type of lens forms always a virtual image?

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Question:
Which type of lens forms always a virtual image?