

MCQOPTIONS
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1. |
What does ‘a’ stands for in the given equation?$ |
A. | <sup>2</sup>(n<sub>1</sub><sup>2</sup>-n<sub>2</sub><sup>2</sup>) |
B. | Radius of the core |
C. | Constant |
D. | Coefficient of refraction |
Answer» B. Radius of the core | |