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
Join The Discussion
Comments ( 2 )
Related Questions on Heat and Mass Transfer
The heat is transferred by conduction, convection and radiation in
A. Melting of ice
B. Boiler furnaces
C. Condensation of steam in condenser
D. None of these
Heat is transferred by all three modes of transfer, viz. conduction, convection and radiation in
A. Electric heater
B. Steam condenser
C. Boiler
D. Refrigerator condenser coils
The radiation emitted by a black body is known as
A. Black radiation
B. Full radiation
C. Total radiation
D. All of these
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)