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Question
Which type of lens forms always a virtual image?
Solution
A concave lens always forms a virtual image of an object.
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RELATED QUESTIONS
The distance between principal focus and optical centre of the lens is _________.
- diameter
- focal length
- principal axis
- optical centre
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(b) −400 mm
(c) −4 m
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Complete the ray diagram to show how the rays pass into and out of the lens?
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| Sr. No. | Position of the object | Position of the image | Nature of the image |
| 1. | Beyond 2F1 | __________________ | ________________________ |
| 2. | __________________ | At infinity | ________________________ |
| 3. | __________________ | __________________ | Real, inverted and enlarged |
