 
			 
			MCQOPTIONS
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				| 1. | If the speed of light in air is represented by e and the speed in a medium is u, then the refractive index of the medium can be calculated using the formula_______. | 
| A. | v/c | 
| B. | c/v | 
| C. | c/(2.v) | 
| D. | (c-v)/c | 
| Answer» C. c/(2.v) | |