When the planes of the absorbing ring and vortex have a small angle, absorption is more efficient than at large angles.
(the planes of the absorbing ring and vortex; have; a small angle) (absorption; is; more efficient than at large angles; T:When the planes of the absorbing ring and vortex have a small angle)
the planes of the absorbing ring and vortex absorption
have is
a small angle
more efficient than at large angles T:When the planes of the absorbing ring and vortex have a small angle