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| Numerical - 05 |
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| 05. An object of size 3.0 cm is placed 14 cm in front of a concave lens of focal length 21 cm. Describe the image produced by the lens. What happens if the object is moved farther from the lens? |
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| Suggested solution: |
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| O = 3.0 cm, u = -14, f = -21 cm |
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| On simplification, v = -8.4 cm |
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| The image is erect, virtual and located 8.4 cm from the lens on the same side as the object. |
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| As the object is moved away from the lens, the virtual image moves towards the focus of the lens but never beyond. The image progressively diminishes in size. |
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