Heat TransferEasy
Question
A substance when at high temperature emits wave lenght λ1, λ2, λ3, and λ4 only when this substance is at low temperature then it will absorb only following wave lengths.
Options
A.λ1
B.λ2
C.λ2 & λ3
D.λ1, λ2 λ3 & λ4
More Heat Transfer Questions
Three objects colored black, gray and white can withstand hostile conditions upto2800oC. These objects are thrown into a...If the rate of emission of radiation and the rate of absorption by surface of a body are same then the temperature of bo...A black body at 200 K is found of exit maximum energy at a wavelength 14 mm. When its temperature is raised to 1000 K, t...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 point source of heat of power P is placed at the center of a spherical shell of mean radius R the material of the shel...