A Pulsar (A Rotating Neutron Star) Emits Pulses at a Frequency

Multiple Choice

A pulsar (a rotating neutron star) emits pulses at a frequency of 0.40 kHz. The period of its rotation is

A) 0.25 s.
B) 2.5 s.
C) 25 ms.
D) 2.5 ms.
E) 0.025 s.