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
In the normal use of a simple microscope, a person sees an ...
Efficiency of a transformer is equal to ...
Calculate the energy stored in a 20\(\mu F\) capacitor. If the p.d between the plates is 40V...
When salt is dissolved in water, the freezing point of the water ...