  We study gravitational redshift of photons and neutrinos radiated by the
braneworld neutron or quark stars that are considered in the framework of the
simple model of the internal spacetime with uniform distribution of energy
density, and the external spacetime described by the Reissner-Nordstr\"{o}m
geometry characterized by the braneworld "tidal" charge $b$. For negative tidal
charges, the external spacetime is of the black-hole type, while for positive
tidal charges, the external spacetime can be of both black-hole and
naked-singularity type. We consider also extremely compact stars allowing
existence of trapped null geodesics in their interior. We assume radiation of
photons from the surface at radius $R$, neutrinos from the whole compact star
interior, and their motion along radial null geodesics of the spacetime. In
dependency on the compact stars parameters $b$ and $R$, the photon surface
redshift is related to the range of the neutrino internal redshift and the
signatures of the tidal charge and possible existence of extremely compact
stars are discussed. When both surface (photon) and internal (neutrino)
redshift are given by observations, both compact star parameters $R$ and $b$
can be determined in the framework of our simple model.
