1. A(n) is an image of a distant object caused by light refraction through air of varying temperature.

2. A(n) is a curved piece of glass or other transparent substance that is used to refract light.

3. A(n) lens is thicker in the center than at the edges.

4. A(n) lens is thinner in the center than at the edges.

5. The is a measure of how much a ray of light bends when it passes from one medium into another.

Acommercial refrigerator with refrigerant-134a as the working fluid is used to keep the refrigerated space at -35°c by rejecting waste heat to cooling water that enters the condenser at 18°c at a rate of 0.25 kg/s and leaves at 26°c. the refrigerant enters the condenser at 1.2 mpa and 50°c. if the compressor consumes 3.3 kw of power, determine (a) the mass flow rate of the refrigerant, (b) the refrigeration load, (c) the cop, and (d) the minimum power input to the compressor for the same refrigeration load.