When α is absorptivity, ρ is reflectivity and τ is transmissivity, then for a diathermanous body,
A. α = 1, ρ = 0 and τ = 0
B. α = 0, ρ = 1 and τ = 0
C. α = 0, ρ = 0 and τ = 1
D. α + ρ = 1 and τ = 0
Answer: Option C
Solution (By Examveda Team)
Diathermanous body is a body which transmits all the incident radiation without absorbing or reflecting.(A body with transmitivity 1, reflectivity 0 and absorptivity 0) Air, up to certain extent can be considered as the diathermanous body because, it transmits all the radiation without hearing itself.
This Question Belongs to Mechanical Engineering >> Heat And Mass Transfer
This answer is wrong..
Right answer is C
Diathermanous body is a body which transmits all the incident radiation without absorbing or reflecting. (A body with transmitivity 1, reflectivity 0 and absorptivity 0)