My explanation of gravitational lensing (not in relativistic view):

The electromagnetic field of a light photon in transit interacts with the gravitation filed of a massive celestial body between its transit paths, they exchange energy through their fields’ interactions depending upon their masses, as a result such a light photon gains energy in an arch like order as it passes said gravitational body. It is so obvious in the minds of any reasonable scientific persons.

Since the light photon, in transit, cannot increase its natural speed so it bounds to increase its energetic frequency, correspondingly it not only decreases it wavelength rather it increases its momentum too, as per relevant behaviour of photons (𝑝 = ℎ/𝜆).

However, the light photon doesn’t store the energy that it’s gaining temporarily, rather it releases the energy gaining by way of converting it into its momentum, this makes the photon’s path of interaction an arc like, therefore the light photon again continues its journey in a straight path, as soon as it releases temporarily gained energy. This is how gravitation lens work.

#GravitationLens

Brief explanations in expansion, acceleration, dark energy, antigravity etc

Reasonably, a natural thing can physically expand or change in distance, but none can physically expand, say, an idea of addition or deduction or multiplication etc. similarly, not space or time, since space is an infinite three-dimensional extent, where objects and events contain relative position and direction. And dimension is an extension of the abstract concept of mathematics. For example, a line is one-dimensional, a plane is two-dimensional and space is three-dimensional. Therefore, space is not an entity but an abstract concept.

Since space is a concept in extension of height, width and depth, accordingly it is described in the earlier post that space itself cannot expand, but what expanding is the distances among relevant galaxies.

The reason for acceleration is mentioned in the post, "antigravity is stronger than gravity," where dark energy or antigravity cause by dark energy practically has no influence within a galaxy up to the zero gravity sphere around a galaxy. Dark energy rules beyond zero gravity sphere and so antigravity is effective not only beyond a galaxy but also beyond the galaxy's zero gravity sphere around it.

However, what in the background is that the effective mass of dark energy is <0 and so it causes antigravity and the strength of antigravity is stronger than gravity as one approaches towards the edge of the visible universe.

The anti-gravitational field interacts with the gravitational fields of gravitationally bound galaxies - in tug of wars. But there is no effect of dark energy within a gravitationally bound galaxy.

Since effective mass of antigravity is much stronger than the effective matter mass of gravity in the universe, including the dark matter, expansions in the distances among galaxies accelerate as they recede towards the edge of the visible universe, and it is inevitable.

Reference Original Post

#antigravity #expansion #darkenergy #darkmatter