Heat TransferMedium
Question
If the adsorption coefficient and reflection of a surface of a body are 0.6 restively then : -
Options
A.Emissive power will be 0.2
B.Transmission power will be 0.2
C.Body will be totally transparent
D.Body will be totally opaque.
Solution
For a grey body
σ + r + t = 1if = 0.4, r = 0.6
then t = 1 - 0.4 - 0.6 = 0
The body is opaquer
σ + r + t = 1if = 0.4, r = 0.6
then t = 1 - 0.4 - 0.6 = 0
The body is opaquer
Create a free account to view solution
View Solution FreeMore Heat Transfer Questions
The ratio of the diameters of two metallic rods of the same metarial is 2 : 1 and their lengths are in the ratio 1 : 4. ...A heat flux of 4000 J/s is to be passed through a copper rod of length 10 cm and area of cross section 100 cm2. The ther...A system S receives heat continuously from an electrical heater of water 10W. The temperature of S becomes constant at 5...Temperatures of two hot bodies β1 and β2 are 100oc and 800 c respectively. The temperature of surrounding is 4...The cause of air currents from ocean to ground is :...