A small perfectly black disc is initially at 500 K and radiates energy at a rate of…
PHYSICS · Subjective · CBSE · Physics · Thermal Properties of Matter · Thermal Properties of Matter
Problem
A small perfectly black disc is initially at 500 K and radiates energy at a rate of 1.20 kW m⁻².
(i) Calculate the percentage increase in its radiant power per unit area when the temperature is raised uniformly to 550 K.
(ii) Determine the new radiant power per unit area of the disc after heating.