Question

Black holes have such a massive gravitational force that even light cannot escape from it. If light is indeed attracted by gravity, then does that mean that light has mass?

Answer 1

Light has particle nature and wave like nature. This means we can consider the light as having mass but to very negligible quantity. Because we should take in to consideration that the speed of the light is 3*10^8 m/s In this high speed, the mass should be soo negligible or even can be considered mass less. But that doesn't mean that light isn't made of particles. The characters like,polarisation is due to,the particle like nature of wave

Answer 2

hey


here is answer

hey dear black hole haven't have black colour.
it seems to look like black in colour.

it is because the space time in black hole bent inward because of the gravitational force.
and according to. theory of. relativity
it is the postulate that

nothing can travel higher than the speed of light..

because of gravitational force. and space time curvature even light didn't escape from. the. black hole but out side there is light so it looks like black in colour



Scalar fields are a common theme in modern cosmology. They play a
central role in inflation, and they have frequently been used to describe
dark energy in place of the cosmological constant. Classical scalar fields
have also been proposed as possible candidates for the dark matter
component of the universe. One of the SFDM models proposes that
galactic haloes are formed by a Bose-Einstein condensation of a scalar
field (Matos 2000, Arbey 2001).
Given the fact that super-massive black holes seem to exist at the centre
of most galaxies, a scalar field configuration should be stable in the
presence of a central black hole, or at least be able to survive for
cosmological time-scales.
Juan Carlos Degollado (UA) Dynamics of scalar fields around black holes.
A simple proposal is to consider that dark matter is made of a massive
scalar field, whose properties could explain the behaviour of dark matter
at all scales. The scenario of galactic formation, for instance, is as
follows: a sea of scalar field particles fills the Universe and forms
localized primordial fluctuations that could collapse to form stable
objects, which are interpreted as the dark matter halos of galaxies.
Juan Carlos Degollado (UA) Dynamics of scalar fields around black holes.
Scalar fields as cosmological background:
It is assumed that the scalar particles decouple after inflation in the early
universe, after which the field has a simple quadratic potential with no
interactions. Ultra-light particles form a pure ground state condensate
with a high critical temperature behaving like cold dark matter today.
The condition for the formation of BEC in an expanding Universe can be
derived in a simple way if it is assumed that the scalar field particles
reached thermal equilibrium with other particles at early times, then the
thermal evolution of scalar field particles can be described by the
behaviour of the scalar number density of particles nφ during an
adiabatic process.
Juan Carlos Degollado (UA) Dynamics of scalar fields around black holes



hope it helps

thanks