An electric heater of surface area `200cm^2` emits radiant energy of 60 kJ at time interval of 1 min
Channel: Doubtnut
Date: 2020-07-26

An electric heater of surface area `200cm^2` emits radiant energy of 60 kJ at time interval of 1 min. Determine its emissive power. If its emissivity be 0.45, what would be the radiant energy emitted by a black body in one hour, identical to the electrical heater in all respects?