Linked Questions
14 questions linked to/from Bending of light - photon's inertia instead of mass
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How are photons effected by gravity? [duplicate]
If we use E²=m²c⁴+p²c², and we know mass of photon is zero, and they have momentum but why aren't they affected by gravity.
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0
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121
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Bending of light Ray in radially varying refractive index [duplicate]
If light passes near a massive object, the gravitational interaction causes a bending of the ray. This can be thought of as happening due to a change in the effective refrative index of the medium ...
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9
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Does Newtonian mechanics predict the bending of the course of light by objects with mass?
$$F=G m_1 m_2/d^2$$
$$F=ma$$
$$a_g=Gm_{\rm other}/d^2$$
In Newtonian mechanics, the acceleration of object A toward object B is not dependent on the mass of object A but on the mass of object B and ...
user9676
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9
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How can gravity affect light?
I understand that a black hole bends the fabric of space time to a point that no object can escape.
I understand that light travels in a straight line along spacetime unless distorted by gravity. If ...
50
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3
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How are classical optics phenomena explained in QED (Snell's law)?
How is the following classical optics phenomenon explained in quantum electrodynamics?
Reflection and Refraction
Are they simply due to photons being absorbed and re-emitted? How do we get to Snell'...
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12
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6
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2k
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Can relativistic mass actually change gravitational pull?
I've heard that relativistic mass can influence gravity, but this seems to create a paradox, unless I am missing something.
It seems to me that if there were two celestial bodies that are observed to ...
- 281
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4
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444
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Why can't relativistic mass equation be put in Newtonian Gravitation equation?
According to special theory of relativity, we know that any equation that contains mass is corrected by $$ m\to \frac{m_0}{\sqrt{1-v^2/c^2}},$$
where $m_0$ is the rest mass. In the case of momentum, ...
user240696
2
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2
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Does gravitational lensing violate Fermat's Principle that light must travel in straight lines?
Does bending of light due to warping of space violate Fermat's Principle or is it that in the principle light goes in a straight line with respect to space (taking space as the reference) and in ...
- 3,915
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2
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What would be the photon's effective mass in Newton's Law of Gravitation?
If we equalize the force from the Newton's Law of Gravitation to Force on a photon in a gravitional field (I don't know if there is an equation for it). What would be the photon's effective mass? (I ...
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3
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4
answers
2k
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Equivalence Principle and bending of light
Basically, the equivalence principle (EP) states that if someone is in a rocket in empty space with acceleration $g$ equal to that at the surface of the earth, any experiment he does cannot ...
- 2,796
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3
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185
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Photon trajectories affected by gravity [duplicate]
If the gravity of a star can change the trajectory of a photon, is the speed of the photon reduced at the moment of departure from the stellar's surface? Can modern science calculate the measure of ...
Zhu
2
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3
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Is there a need to consider the relativistic mass when calculating gravitational potential energy?
The equation for gravitational potential energy is:
$$V(r) ={GMm\over r}$$
In the reference frame where $M$ is stationary. I am wondering for mass $m$ here do we need to consider its relativistic ...
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1
answer
74
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Observing starlight bending in high gravity
I note that there is a fair amount of light-bending questions, but I don’t really see the observer effect I am asking about. I apologize there is an answer already.
I wonder if the Earth’s gravity – ...
- 351
1
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0
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82
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Inertial mass and gravitational mass [closed]
I would like to ask about gravitational mass. I know inertial mass is changing by motion (speed) according to $m=\frac{m_o}{(1-v^2/c^2)^{1/2}}$ And also that is inertial mass which sits in $E=mc^2$. ...
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