Afilm of oil that has an index of refraction of 1.45 rests on an optically flat piece of glass of index of refraction n = 1.60. when illuminated with white light at normal incidence, light of wavelengths 642 nm and 428 nm is predominant in the reflected light.

determine the thickness of the oil film.

Arefrigerator uses r-134a as the working fluid and operates on the ideal vapor-compression refrigeration cycle except for the compression process. the refrigerant enters the evaporator at 120 kpa with a quality of 34 percent and leaves the compressor at 70°c. if the compressor consumes 450 w of power, determine (a) the mass flow rate of the refrigerant, (b) the condenser pressure, and (c) the cop of the refrigerator. (0.00644 kg/s, 800 kpa, 2.03)