Question

-- A white dwarf star does not show a pulsar but a neutron star does. Use the principle of conservation of angular momentum to explain why this occurs.

please write short answer

Answer 1

Expression for angular momentum

L = mvr

Conservation of angular momentum states that total angular mometum always constant with respect time.

In the case of a a star changes from a regular one to a neutron star, the diameter of star contracts as its density increases. In order to conserve angular momentum, the spin rate of star increases.

As the neutron star spins at very higher rate, the beams of electromagnetic waves reaches us, producing the characteristic ‘pulses..called pulser. However, the total mometnum of the system is conserved.