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Question
Distinguish between:
Concave lens and Convex lens
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Solution
| Concave lens | Convex lens | |
| 1. | It is a diverging lens because it diverges the rays falling on it. | It is a converging lens because it converges the rays falling on it. |
| 2. | It is thin at the center and bulged at the edge. | It is thin at the edge and bulged at the centre. |
| 3. | The image formed by concave lens is always diminished and virtual. | The image formed by convex lens can be real as well as virtual. Also, the image formed can be diminished as well as magnified. |
| 4. | It has a virtual focus. | It has a real focus. |
RELATED QUESTIONS
A student wants to project the image of a candle flame on the walls of school laboratory by using a lens:-
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(c) Draw ray diagram to show the formation of the image in each case?
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i. Which type of microscope has the arrangement of lenses shown in the adjoining figure?
ii. Label the figure correctly.
iii. Write the working of this microscope.
iv. Where does this microscope used?
v. Suggest a way to increase the efficiency of this microscope.
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A lens always forms an image between the object and the lens.
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: Object near the lens : : ______ : 
