 
			 
			MCQOPTIONS
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				| 1. | The law governing the distribution of radiant energy over wavelength for a black body at fixed temperature is referred to as | 
| A. | Kirchhoff’s law | 
| B. | Planck’s law | 
| C. | Wein’s formula | 
| D. | Lambert’s law | 
| Answer» C. Wein‚Äö√Ñ√∂‚àö√ë‚àö¬•s formula | |