Escape speed and black holes

When the escape speed equals the speed of light, what does this mean?

[@CrossoverManiac]

The escape velocity equation is derived from an energy balance equation between kinetic energy and gravitational potential energy, but the kinetic energy of a mass traveling at the speed of light isn't 0.5×mass of the object×(299,792,458 m/s)^2 or approximately 9×10^16 J/kg. The KE is infinite. It's Newtonian physics that says the object's KE is proportional to the square of the velocity always, even at the speed of light.

[@RelentlessBROfficial]

That's true. What we're seeing right here is only a coincidence. The actual derivation of the Schwarzschild radius equation takes into account Einstein's general relativity. Somehow, though, we can derive this very same equation using Newtons mechanics. That's quite a nice coincidence.

[@interresistance7614]

Suppose an object thrown in such velocity it it would escape. In its journey when the object moves,the gravity of earth tries to stop but it donot stop,so when its is outside earth,The velocity of the object with which it is on earth is always greater than the velocity it is moving in vaccum. That means the velocity of the object has kind of slowed finally. So when light tries to escape from the radius little bit greater than Swarchild Radius then light should also face the slowing of velocity. But Relativity says light can never move less than 'c' WHY?

[@umarajkumar1641]

That's s good question....To understand that You should check out video of PBS space time about the speed of light.Well the speed of light is actually not the speed of light but is the speed of causality. Interesting and kind of stupid but True .....

[@mr.scientist7205]

Wow at 2014 upload and it's 2022 the scientist is watching it now 🙂

[@umarajkumar1641]

I am not able to understand how he manages to write inverted from his perspective behind the mirror board.... Sir hats off.....

[@MaulikSrivastava]

Lmao the video is mirrored

[@maurpine]

some argue that Newtonian escape speed pertains to Euclidean space, while black holes pertain to Einstein's space-time geometry. If that is the case, then establishing the radius 'R' where forces are invoked as the same radius of an object in space-time geometry, where there are no forces, would be invalid.

[@Al-cynic]

the squeaky lectures where intense...what happened?

[@kurtpiket6739]

When light can not escape from a black hole, now there must be a force preventing this light for escaping. Light has waves between two "poles", between + and -, between male and female. When black holes are known as singular presences, there is NO bipolar impact. Now there is only one sided attraction and contraction from all around, which is present inside relativtity. How is this singular impact named? Is this singular electricity or is it singular gravitation? It is just a name!! Moreover by this view electricity and "gravitation" are related, by alignment and by entanglement also. A flat universe of no-waves and moving waves of points inside of it is the result.

[@niroos6819]

so fascinating thanks a whole lot

[@yoprofmatt]

You are welcome. Cheers, Dr. A

[@frankdimeglio8216]

@@yoprofmatt WHAT IS E=MC2 IS dimensionally consistent, AS TIME is NECESSARILY possible/potential AND actual ON/IN BALANCE; AS ELECTROMAGNETISM/energy is CLEARLY AND NECESSARILY proven to be gravity (ON/IN BALANCE); AS WHAT IS E=MC2 is taken directly from F=ma; AS the rotation of WHAT IS THE MOON matches the revolution; AS the stars AND PLANETS are POINTS in the night sky. Consistent WITH WHAT IS E=MC2, “mass"/ENERGY involves BALANCED inertia/INERTIAL RESISTANCE consistent WITH/AS what is BALANCED electroMAGNETIC/gravitational force/ENERGY; AS ELECTROMAGNETISM/energy is CLEARLY AND NECESSARILY proven to be gravity (ON/IN BALANCE) !!! SO, what are OBJECTS may fall at the SAME RATE !!! WHAT IS GRAVITY IS, ON BALANCE, an INTERACTION that cannot be shielded (or blocked). Consider the man who IS standing on what is THE EARTH/ground. Consider what is THE EYE ON BALANCE !!! Now, consider what is the TRANSLUCENT AND BLUE sky !!! (What is THE EARTH IS ALSO BLUE !!!) Again, consider WHAT IS E=MC2 !!! c squared CLEARLY (AND NECESSARILY) represents a dimension of SPACE ON BALANCE, AS TIME is NECESSARILY possible/potential AND actual ON/IN BALANCE; AS ELECTROMAGNETISM/energy is CLEARLY AND NECESSARILY proven to be gravity (ON/IN BALANCE). It ALL CLEARLY makes perfect sense ON BALANCE, AS BALANCE AND completeness go hand in hand. Great. By Frank Martin DiMeglio In understanding SPACE, what is gravity, TIME, AND time dilation (ON BALANCE), it is important is it to understand what is a BALANCED displacement of what is SPACE. ELECTROMAGNETISM/energy is gravity ON/IN BALANCE. Consider what is E=MC2. TIME is NECESSARILY possible/potential AND actual ON/IN BALANCE. Consider TIME AND time dilation ON BALANCE. (c squared CLEARLY represents a dimension of SPACE ON BALANCE.) Indeed, the stars are POINTS in the night sky ON BALANCE. The rotation of WHAT IS THE MOON matches the revolution. Consider what is THE EYE, AND notice what is the TRANSLUCENT AND BLUE sky ON BALANCE. NOW, consider what is the BALANCED MIDDLE DISTANCE in/of SPACE. CLEARLY, BALANCED inertia/INERTIAL RESISTANCE is fundamental (ON BALANCE). “Mass"/ENERGY IS GRAVITY. ON BALANCE, consider what is the orange (AND setting) Sun. “Mass"/ENERGY involves BALANCED inertia/INERTIAL RESISTANCE consistent WITH/as what is BALANCED electromagnetic/gravitational force/ENERGY, AS ELECTROMAGNETISM/energy is CLEARLY AND NECESSARILY proven to be gravity (ON/IN BALANCE); AS gravity/acceleration involves BALANCED inertia/INERTIAL RESISTANCE (ON BALANCE) consistent WITH E=MC2, F=ma, TIME, AND time dilation ON BALANCE. This CLEARLY AND NECESSARILY represents, DESCRIBES, AND INVOLVES what is possible/potential AND actual ON/IN BALANCE, AS ELECTROMAGNETISM/energy is CLEARLY (AND NECESSARILY) proven to be gravity (ON/IN BALANCE). Notice what is the fully illuminated (AND setting/WHITE) MOON ON BALANCE. Great. TIME is NECESSARILY possible/potential AND actual ON/IN BALANCE. Indeed, inertia/INERTIAL RESISTANCE is proportional to (or BALANCED with/AS) GRAVITATIONAL force/ENERGY; AS ELECTROMAGNETISM/energy is CLEARLY AND NECESSARILY proven to be gravity (ON/IN BALANCE). This CLEARLY explains what is E=MC2 AND F=ma ON BALANCE, AS TIME is NECESSARILY possible/potential AND actual ON/IN BALANCE !! (Consider TIME AND time dilation ON BALANCE.) Great. Indeed, consider WHAT IS THE EARTH/ground ON BALANCE. I have mathematically proven why the rotation of WHAT IS THE MOON matches the revolution, AS ELECTROMAGNETISM/energy is CLEARLY (AND NECESSARILY) proven to be gravity (ON/IN BALANCE). Consider TIME AND time dilation ON BALANCE, AS the stars AND PLANETS are POINTS in the night sky ON BALANCE; AS c squared CLEARLY represents a dimension of SPACE ON BALANCE. (Consider what is THE EYE ON BALANCE.) I have mathematically proven what is the fourth dimension, AS ELECTROMAGNETISM/energy is CLEARLY AND NECESSARILY proven to be gravity (ON/IN BALANCE) !!! I have explained why what are OBJECTS may fall at the SAME RATE. By Frank Martin DiMeglio

[@MdSajir-bn6vb]

you look lowkey benedict cumberbatch...

[@yoprofmatt]

So I've heard. Like "Khan" or "Dr. Strange"? Cheers, Dr. A

[@MdSajir-bn6vb]

Matt Anderson Khan...

[@yoprofmatt]

Cool. Awesome character. Cheers, Dr. A

[@arahul4045]

Ben Affleck is more accurate.

[@georgiamay4045]

totally kinda cool

[@yoprofmatt]

Totally. Cheers, Dr. A

[@georgiamay4045]

@@yoprofmatt Dr. A.. you suggested sending my solution for FLT for peer review.. any suggestions on whom to send it to?

[@JJJJ-he8bz]

lol how can something have an escape velocity greater than light its self.

[@yoprofmatt]

JJ JJ, It cannot. Which is why we talk about nothing being able to escape from a black hole. Thanks for the comment, and keep up with the physics! You might also like my new website: www.universityphysics.education Cheers, Dr. A

[@JJJJ-he8bz]

@@yoprofmatt what I’ve come to understand is inside the event horizon things are completely different since the singularity because a future event basically does this mean the escape speed inside the horizon infinite?

[@rkams6347]

sir, we r considering c to be escape velocity of black hole but what if it has greater escape velocity.

[@yoprofmatt]

The Schwarzschild radius is the distance from a black hole where the escape velocity = c. One way to think about is this: Inside this radius, the escape velocity > c, and outside it the escape velocity < c. When people refer to the "size" of a black hole, they usually mean the Schwarzschild radius. Here's the wikipedia link: en.wikipedia.org/wiki/Schwarzschild_radius Cheers, Dr. A

[@robbert1978]

@@yoprofmatt The Schwarzschild radius is a consequence of Einstein's General Relativity, black holes too. A photon doesnot not follow Newton's mechanics, it doesn't have mass(m=0) so it doesn't have kinetic energy and potential energy so your escape speed equation cannot be applied to photons.Your results are a coincidence.

[@Dave_Kerman]

@@robbert1978 Photons do carry energy, they're the physical result of an exchange in energy between 2 objects (example electron against a proton). In fact you can't move anything without kinetic energy

[@robbert1978]

@@Dave_Kerman ah yes. Photons actually have KE =hf, it’s not 0.5mv^2 like classical physics

[@maurpine]

is contradiction to say the escape velocity is the speed of light and then say light cannot escape! its having and not-having at the same time

[@yoprofmatt]

True, but that would be the boundary between escaping and not escaping. We look for limits all the time in physics. Cheers, Dr. A

[@kellywhitcomb5508]

This is interesting. kzbin.info/www/bejne/Zl7bdICQgbqWaKM

[@kellywhitcomb5508]

What about this? kzbin.info/www/bejne/eqWwlphpp9d7ers

[@kellywhitcomb5508]

kzbin.info/www/bejne/movFdX-aaZeIrdU

[@WaveFunctionCollapsed]

IS HE WRITING MIRROR / GLASS

[@deenial]

8:25 I never understood why the photon shooting up is under the same rules as a rock. Right now the photon of my flashlight pointing up is decelerating at 10m/s*s ? no

[@kellywhitcomb5508]

What about this? kzbin.info/www/bejne/Zl7bdICQgbqWaKM

[@epaulk1969]

@@kellywhitcomb5508 -- Stephen Crothers is a complete quack.

[@PhysicsUnsimplified]

This does not make sense. Just because an object doesn't have escape velocity doesn't mean it can't escape. Take a rocket ship to the moon, for example.

[@rafaelyeomans3229]

the rocket ship can go to the moon in the first place bc it HAS escape velocity

[@JJJJ-he8bz]

The escape velocity inside the horizon is basically limitless