Question

Although electrons, protons and neutrtons obey the exclusion principle, some particles that have integral spin, such as photons, do not. Expalin. ​

Answer 1

Particles with an integer spin, or bosons, are not subject to the Pauli exclusion principle: any number of identical bosons can occupy the same quantum state, as with, for instance, photons produced by a laser or atoms in a Bose–Einstein condensate.