McqMate
| Q. |
Which of the following statements is correct? |
| A. | convex lens has positive focal power and concave lens have negative focal power |
| B. | convex lens has negative focal power and concave lens have positive focal power |
| C. | all lens have positive focal power |
| D. | all lens have negative focal power |
| Answer» A. convex lens has positive focal power and concave lens have negative focal power | |
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