

MCQOPTIONS
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1. |
Dioptre power of an concave lens of 10 cm focal length is |
A. | 10 dioptre |
B. | 10 dioptre |
C. | 1 / 10 dioptre |
D. | 1 / 10 dioptre |
Answer» C. 1 / 10 dioptre | |