MCQOPTIONS
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				| 1. | 
                                    The rate of energy emission from unit surface area through unit solid angle, along a normal to the surface, is known as$? | 
                            
| A. | Emissivity | 
| B. | Transmissivity | 
| C. | Reflectivity | 
| D. | Intensity of radiation | 
| Answer» E. | |