What is the relation between absorptivity (α), reflectivity (ρ) and transmissivity (τ) for gray body? A. ρ + α + τ =1 B. α + τ =1 C. ρ + τ =1 D. ρ + α =1 Right Answer: D. ρ + α =1 Share : January 24, 2018 Hassan Ali Mechanical Engineering Total 0 Votes: 0 0 Tell us how can we improve this Mcqs? Captcha: + = Verify Human or Spambot ? Related Mcqs Check Below -The rotation of gears in internal gear pump takes place in?Identify the incorrect statement. Apparent shear forces?Which of the following operations is/are performed on a lathe machine?