Home › Bihar Board Class 12 (Science) › Physics › Ray Optics and Optical Instruments › One dioptre is equal to:
One dioptre is equal to:
AOne centimetre
BOne metre per sec
COne per metre
DOne metre squared
Answer & Solution
Correct answer: C. One per metre
Power is the reciprocal of focal length in metres, so 1 D = 1 m^-1.
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