 
			 
			MCQOPTIONS
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				| 1. | Critical angle of electromagnetic radiation takes place if | 
| A. | angle of incidence is equal to angle of refraction | 
| B. | angle of incidence is greater than the angle of refraction | 
| C. | angle of incidence is equal to 90° | 
| D. | angle of refraction is equal to 90° | 
| Answer» E. | |