Physics Stack Exchange is a question and answer site for active researchers, academics and students of physics. Why does a gravitational field permanently alter the direction of photons? A photon's inertial mass M is not

Thanks for contributing an answer to Physics Stack Exchange! So particles of light obeying the laws of free fall accelerate along the direction of gravity (Fg ) while the constant velocity c is not changing. Like all elementary particles, photons are currently best explained by quantum mechanics and exhibit wave–particle duality, exhibiting properties of waves and of particles. Can it have inertia? (See my INVALID GENERAL RELATIVITY).

site design / logo © 2020 Stack Exchange Inc; user contributions licensed under cc by-sa. The photon energy is given by E=hf, where h is Planck's constant. Multiplying Fm/q by 2πr we get the Faraday EMF as. Isaac Asimov may have written a science-fiction short story about "sun sailing" in the 1950's, I'll have to check my library to see if this is true.

In fact, quantum mechanics tells us that the energy is planck's constant times the frequency. The relation between and is obtained from the condition , leading to the constant of motion .

Note that in 1935 the experiments of the Quantum Entanglement confirmed the well established laws of gravity (1687), of Coulomb ( 1785), and of Ampere (1820), including fundamental forces acting at a distance. Use MathJax to format equations.

Nevertheless under the influence of massless quanta of fields many physicists today do not accept the dipole nature of photons. On the same wrong way Feynman (1950) in his theory of the Quantum Electrodynamics influenced by both Einstein’s massless quanta of fields  and by Yukawa’s meson theory (1935) , introduced the false concept that the electromagnetic forces of long range could be carried by strange massless quanta of fields called “virtual photons” , though the electric field for simplifying the problems of the Coulomb law was defined as a force per unit charge, which cannot carry the same force. In this case I discovered that according to the matter-photon transformation, the energy ΔΕ of the charge-charge interaction between an electron and a positron turns into the energy hν of two photons, while the mass ΔΜ  of them turns into the mass m of photons.

Only if all the four vectors of zero mass are collinear in space will the total mass be zero. The moment of inertia must be specified with respect to a chosen axis of rotation. Moreover, the identification of "kinetic mass" with "inertial mass" is simply incorrect, assuming you're using the standard definition of inertial mass. The question, "Do photons have mass," shines a light on …

Such wrong ideas led to the crisis of physics, because Faraday abandoned the well-established laws of forces acting at a distance. A photon's energy tends to zero, because of red shift, when an observer approaches light speed in parallel to it. Homework Statement Find the mass of photon in motion. In 1926, he coined the term "photon" for the smallest unit of radiant energy (light). If time stops at the velocity of light, how can a photon oscillate with a frequency? In this case one observes a blue shift energy hδν. The momentum p=mc or hf/c. For example in the well-established law of Coulomb the fundamental electric force Fe  acting at a distance is given by, But for the simple solution of problems such a force acting at a distance can be written as. (Photon Momentum, Speed of a Pressure Wave), The principle behind Inertia and it's connection to Equilibrium. I'm not transferring into the photon's rest frame. That is, one observes that matter as well as light possesses  both wave and corpuscular properties. This answer specifically states that a photon, having stress-energy, contributes to the stress-energy tensor, thus has gravitational mass, and this fact together with the fact that photons do have their own gravitational effects means that inertial mass=gravitational mass for the photon. For example, the pressure of electromagnetic radiation on an object derives from the transfer of photon momentum per unit time and unit area to that object, since pressure is force per unit area and force is the change in momentum per unit time.

In fact, the  beta decay is due to neutrinos or antneutrinos which have mass and opposite charges and according to natural laws they interact electromagnetically with the charged quarks in protons and neutrons. He explained his experiment by using the very important concept of electromagnetic mass  (m ) proposed by J.J. Thomson.