A perfect emitter or absorber of radiant energy is a
...A perfect emitter or absorber of radiant energy is a
conductor
black body
white body
red body
Correct answer is B
Dull, black surface are good emitters or absorbers of energy
An object moves with uniform speed round a circle. Its acceleration has ...
The region around a magnet in which the magnetic influence is experienced is called ...
The conclusive test for magnetism in a steel bar suspended horizontally at its midpoint is...