An ideal heat-engine is to be used in an environment where, Ask an Expert

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Q1. The drawing shows the rectangular block of glass (n = 1.52) surrounded by a liquid with n = 1.630. A ray of light is incident on the glass at point A with a 30° angle of incidence. At what angle does the ray leave glass at point B?

Q2. An ideal heat-engine is to be used in an environment where the ambient temperature is 22.50 °C. What must be the minimum temperature of the hot heat reservoir in order to reach at least 46.40 percent efficiency with heat-engine? (Give the answer in Celsius.)

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