Exam (elaborations)
Optician Practical Exam Study Material | 135 Questions with 100% Correct Answers | Updated & Verified
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a lens focal length may be altered by? - ANS - changing the curvature of one surface what controls the amount of light that enters the eye? - ANS - Iris lights changing direction as it passes from one medium to another is called what? - ANS - refraction meniscus, equiconcave and flat concave ar...
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