THE_NUMERICAL_APERTURE_OF_A_MATERIAL_WITH_ACCEPTANCE_ANGLE_OF_60_DEGRE – McqOptions

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1.	THE_NUMERICAL_APERTURE_OF_A_MATERIAL_WITH_ACCEPTANCE_ANGLE_OF_60_DEGREE_IN_WATER_WILL_BE?$
A.	1.15
B.	2.15
C.	5.21
D.	1.52
Answer» B. 2.15

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