Double Pulsing
Earlier we noted that the Crab Pulsar exhibits two pulses in each cycle, one stronger and one weaker. Such an
effect can be explained by the lighthouse model if the geometry is such that the beam from one
magnetic pole sweeps more directly over the Earth but the beam from the other pole
does so only partially.
Notice that this mechanism means that not all neutron stars will be seen as pulsars. Only if they
are favorably oriented will the beams sweep over the Earth and give a pulsing effect.