While using a 500 W electric heater, bout 15% of the power is converted to visible radiation. Then what will be the average intensity of visible radiation at a distance of 2.5 m from the electric heater?
1
0.955 Watt/m2
2
0.041 Watt/m2
3
0.550 Watt/m2
4
0.155 Watt/m2