Light Acceleration Near Black Holes: The Effects on Gravity

  • Thread starter Moogle
  • Start date
  • Tags
    Constant
In summary, the conversation discusses the behavior of light near a black hole. It is stated that while the light may change direction, it does not change speed. This is because its velocity vector does not change in magnitude. However, physicists consider any change in velocity vector as acceleration. The conversation also mentions that the gravitational potential of a black hole can change the frequency of light, and that momentum is exhibited as frequency according to the equation p=h[nu]. The possibility of eating light on bread is briefly mentioned, but not elaborated on.
  • #1
Moogle
Since the gravity of a black hole affects light, does a baem of light accelerate when it nears a black hole ? Just wondering.
 
Astronomy news on Phys.org
  • #2
Originally posted by Moogle
Since the gravity of a black hole affects light, does a baem of light accelerate when it nears a black hole ? Just wondering.
It doesn't change speed -- but it changes direction.

Physicists refer to any change in the velocity vector an acceleration, though -- so yes, the light does accelerate. Its velocity vector does not change in magnitude however, which means the light does not change speed.

- Warren
 
  • #3


Originally posted by chroot
It doesn't change speed -- but it changes direction.

Physicists refer to any change in the velocity vector an acceleration, though -- so yes, the light does accelerate. Its velocity vector does not change in magnitude however, which means the light does not change speed.

- Warren
nonsense.
when direction changes there are all three: normal, tangentional and torsional changes of the vector.
and how exactly do you find light to be cabable of traveling?
is it in a sense light changes position?
in my room now the lights are on.where do i find the light now?
how do i ensure the light after awhile has gone from there?

finally can you put light on bread and eat it?
 
  • #4
dock, what the heck?? Are you capable of making sensible posts at all anymore, and even of understanding extremely basic vector mechanics?
 
  • #5
A light beam always follow the shortest path through the vacuum. If space is flat that path is a straight line. But near a gravitational source it is a curved line, called a geodesic. Light follows it.

The gravitational potential will not acclerate the ligh, but it will change its frequency. For light, momentum is exhibited as frequency according to the equation momentum equals Planck's constant times frequency. p=h[nu].
 
  • #6
Originally posted by selfAdjoint
A light beam always follow the shortest path through the vacuum. If space is flat that path is a straight line. But near a gravitational source it is a curved line, called a geodesic. Light follows it.

The gravitational potential will not acclerate the ligh, but it will change its frequency. For light, momentum is exhibited as frequency according to the equation momentum equals Planck's constant times frequency. p=h[nu].

Or E = h ν

and p = E/c = hν /c
 
  • #7
Originally posted by marcus
Or E = h ν

and p = E/c = hν /c

that thing that looks like a vee is supposed to be a nu.

I used & nu ; (without the spaces)

is there another way to get nu?

Let's try [ nu ] (w/o the spacing)

E = h[nu]

E/c = h[nu]/c
 
  • #8
dr-dock:
Can you put light on bread and eat it?

Yes, but that is a topic for another thread.
 

1. How does light acceleration near black holes affect gravity?

The intense gravitational pull of a black hole causes light to accelerate towards it. As light is a form of energy, it contributes to the overall mass and therefore strengthens the gravitational pull of the black hole.

2. Can light escape a black hole's gravitational pull?

No, once light enters the event horizon of a black hole, it cannot escape. This is because the gravitational pull is so strong that even light, which has no mass, cannot overcome it.

3. How does light acceleration near black holes affect time?

According to Einstein's theory of relativity, strong gravitational fields, such as those near black holes, can slow down time. As light is affected by gravity, its acceleration near a black hole can also result in time dilation.

4. Is the effect of light acceleration near black holes the same for all types of light?

Yes, the effects of light acceleration near black holes are the same for all types of light, regardless of their wavelength or frequency. This is because all forms of light are affected by gravity in the same way.

5. What other effects can light acceleration near black holes have?

Aside from contributing to the overall mass and gravitational pull of a black hole, light acceleration can also result in gravitational lensing - the bending of light around the black hole. This effect can be used to study and observe distant objects in space.

Similar threads

  • Astronomy and Astrophysics
Replies
2
Views
923
  • Astronomy and Astrophysics
Replies
4
Views
1K
  • Astronomy and Astrophysics
Replies
6
Views
1K
  • Astronomy and Astrophysics
Replies
10
Views
342
  • Astronomy and Astrophysics
Replies
10
Views
1K
  • Astronomy and Astrophysics
Replies
4
Views
1K
Replies
6
Views
798
  • Astronomy and Astrophysics
Replies
4
Views
966
  • Astronomy and Astrophysics
Replies
27
Views
3K
  • Astronomy and Astrophysics
Replies
2
Views
1K
Back
Top