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
A transistor is used in the amplification of signals because it ...
Which of the following statements about defects of vision is/are CORRECT? I. For a long ...
Local actions is normally prevented in a simple electric cell by ...
A 10μC charge moves with a velocity of 1.0 x 105 ms-1 at right angle to a uniform magnetic fie...
In a meter bridge experiment, two resistor 2Ω and 3Ω occupy the left and right gap...