A boy uses spectacles of focal length -50 cm name the defect of vision and calculate the power of the lens. Answer fast
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5
Focal length = -50cm = -0.5m
Power is reciprocal of focal length
P = 1/-0.5 = -2D
sabrinanandini2:
Concave
Answered by
4
your answer is -2. 5 dioptre
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