- Heat Transfer
- Heat Conduction
- Thermal Conductivity
- Thermal resistance and conductance
- Convection heat transfer
- Black Body Radiation
- Stefan Boltzmann law
- Nature of thermal Radiation
- Kirchoff's law
- Newton's Law of Cooling
- Solved examples

The surface of a body has a emissivity of .55 and area of 1.5 m

Find out the following

a. What rate of heat is radiated from the body if the temperature is 50°C

b. At what rate is radiation absorbed by the radiater when the surrounding temperature is 22°C

c What is the net rate of radiation from the body

Given σ=5.67 *10

a) Rate of radiation radiated=eσAT

b) Rate of radiation absorbed=eσAT

c)Net =Rate of radiation radiated-Rate of radiation absorbed=155 W

Class 11 Maths Class 11 Physics Class 11 Chemistry