How is a body considered a blackbody? a. If and only if = a = 1.0 b. If it absorbs incident rays and transmits none. If the emissive power is calculated using the Stefan-Boltzmann Law. d. More than one response. e. None of these. . . If one uses Reciprocity Law, which of the following is true? a. There are only two areas being considered, separated by a certain distance. b. More than two areas can be considered, as long as only two surfaces with different temperatures are considered in calculations. If object 1 is flat, then A F12 = A2F12 = AF11. d. If A1 =A2, then F12 = F22. . . More than one response. f. None of these. In creating a network circuit for M = 3 enclosures, this all holds true except: An SSR requirement must be met, that is one should be a refractory material. b. Re-radiating bodies are considered free floating, that is, their conductance becomes infinite. c. Application of Kirchhoff's Law at the node shall only be done in between radiosities and sink/source. d. A negative value of q obtained from SSR Method means that the flow of electricity assumed is incorrect. e. If a material is insulated, the resistance between this material and the sink/source becomes zero. %3D .