# If photons are massless, why can't light escape the gravitational pull off a blackhole which has gravity at its singularity.?

Gravity is a product of masses in play. So why should light, which is composed of photons which are massless be attracted towards a blackhole? Is there something we are missing about gravity?

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• Tom S
Lv 7
1 year ago

Gravity is a "warpage" or curvature of spacetime. Both matter and radiant energy (light) will follow spacetime.

• goring
Lv 6
1 year ago

Photons have mass and obey the laws of gravity

• 1 year ago

Photons have mass according to Albert Einstein; so they can be pulled by gravitational forces. That is all I know. I am just a humble restaurant worker, but I know this much about light and particulate light. The numeric value of a photon in mass is miniscule. It has to be written in scientific notation. There is mass there though, I guarantee you.

• 1 year ago

We are not missing anything about gravity. Einstein found it.

Gravity is not a force. It is a curvature of spacetime. Light follows a geodesic path, the straightest possible path in a curved space.

• 1 year ago

Light doesn't need Mass because it has Kinetic Energy

If it didn't have Velocity it wouldn't exist

It clearly doesn't come out from a Black Hole

With all that Matter falling in Light goes with it

End of story

Black Holes are weird

Most of what we have learnt about them are guesses and theories

It really is hard to shed some light on the Subject of Black Holes

Source(s): Messier 87
• goring
Lv 6
1 year agoReport

insude the black hole is the substance of space=There is no mass producing light inside the black hole ,that is why its dark

• D g
Lv 7
1 year ago

Photons HAVE. Kinetic mass or relativistic mass

They have 0 rest mass because they never exist at velocity of 0

• 1 year ago

Force of gravity being proportionate to the product of the masses is a good approximation for everyday life, but not strictly true at high gravity, any more than f = ma is valid for objects moving very fast.

• 1 year ago

It's simple physics. As the gravitational pull of an object increases, so does the escape velocity from that object. If the escape velocity exceeds the speed of light, then photons (which can only move *at* the speed of light) don't have the velocity needed to escape.

• neb
Lv 7
1 year ago

Gravity is NOT just the product of masses at play. Massless particles are affected by gravity since they are constrained to follow spacetime curvatures just like everything else. They also gravitate just like everything else. There is no spacetime path available for light to travel from the inside of the event horizon to the outside of the event horizon. We describe gravity with general relativity, not Newton’s law.

• neb
Lv 7
1 year agoReport

What something weighs is not relevant to this question. But of course, for weak gravity and low velocities, yes Newton’s laws work just fine. The interesting thing is that it is the time component of curvature that approximates Newton laws for low velocities and weak fields.

• Anonymous
1 year ago

'black hole' is STILL just a theory ..........................................