MCQOPTIONS
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				| 1. | 
                                    Diffraction of electromagnetic waves | 
                            
| A. | may occur around the edge of a sharp obstacle | 
| B. | is caused by reflections from the ground | 
| C. | arises only with the spherical wave fronts | 
| D. | will occur when the waves pass through a large slot | 
| Answer» B. is caused by reflections from the ground | |