Reflected light will follow the Law of Reflection. Refracted light will follow the Law of Refraction (Snell's Law). Data will prove these two laws within a 10% error.

6–43 a food department is kept at 2128c by a refrigerator in an environment at 308c. the total heat gain to the food department is estimated to be 3300 kj/h and the heat rejection in the condenser is 4800 kj/h. determine the power input to the compressor, in kw and the cop of the refrigerator.