(I didn't understand the math in the paper)
Would this mean that a rotating body in space would eventually slow down? In other words, amplifying EM radiation draws energy from angular momentum?
replies(2):
Would this mean that a rotating body in space would eventually slow down? In other words, amplifying EM radiation draws energy from angular momentum?
"According to a remark by P. L. Kapitza, the effect is analogous to amplification of sound by reflection from a resting-medium boundary that moves with supersonic velocity... In the case of plasma waves, a similar effect was considered recently by Ostrovskil. Mention can also be made of earlier studies dealing with the motion of a conducting liquid in a resonator or the motion of carriers in the interior of an elastic piezoelectric or over its surface."