MCQOPTIONS
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MCQOPTIONS
| 1. |
An optician prescribes a power = -0.5 dioptre. The corresponding lens must be a |
| A. | convex lens of focal length 2 m |
| B. | convex lens of focal length 50 cm |
| C. | concave lens of focal length 2 m |
| D. | concave lens of focal length 50 cm |
| Answer» D. concave lens of focal length 50 cm | |