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ABO Practice Test| Q-Bank| ABO -American Board of Opticianry) + 400 Questions Solved 100% Correct
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ABO Practice Test| Q-Bank| ABO -American Board of Opticianry) + 400 Questions Solved 100% Correct The angle of incidence, for which the angle of refraction is 90 degrees is called the: a. critical ray b. emergent ray c. angle of reflection d. critical angle {Answer: - d. critical angle Wh...
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