Part 1: General relativity has gravity act on photons not directly (as with objects with mass) but by bending the space&time around the object. The photons are unaffected. The path they take is curved, so they appear to bend. Sort of like how you can walk in a "straight line" on earth, but eventually appear where you started. Because the earth is curved, your path is curved, it has nothing to do with how much mass you have.
Now there is a way to describe reflection and refraction using only photons, and that process is described below by other posters:
The process of reflection/refraction is really a process of absorption/emission on a really small level. When electrons, say those of silicon atoms, are bombarded with photons, they absorb their energy, and, quite temporarily, the photon ceases to be observable as light.
The electron then immediately emits a photon in the opposite direction, producing the illusion of light moving more slowly; however, we know that the speed of light is constant in every possible scenario, even outside a vacuum. This just happens to be one of the strange consequences of the quantized state of matter at the sub-atomic level.
An atom is a system which wants to exist in its ground state. It does not want to absorb the energy of a photon and thus, it ejects the energy in the form of a photon (the energy difference as a result of the "collision" is manifested in a slight change in the wavelength/frequency of the emitted photon)
Very good answer above, for further information on electron reflection/diffraction, Richard Feynman has some excellent free video lectures on QED that were intended for the layperson.
Answer2:
Photons have mass and the concept of rest mass is false.
Daring to challenge General Relativity, Photon's have mass W = hf = pc = mcc, thus m=hf/c2= h/cw and thus is affected by gravity.
Einstein's Deflection 1.7" is the result Gravity tan D= .5gt2/150Gm = .5 x9.8 x150G/c2=8.16666E-6 ,
where t= 150Gm/c and g= 9,8 earth's gravity.
Answer 3: There is a reason why gamma, X-ray, Bharat Radiation, and light photons attract towards Earth. Both energy and matter constitute three components: electric, magnetic, and gravitational. In clear words, since photon's gravitational component facilitates attraction towards Earth.
that gravity affected light, space and time itself, and as a result the Sun would deflect starlight passing by it. Changes in the apparent direction of stars in the sky, seen close to the Sun during a total eclipse, could confirm the idea.
No, an asteroid does not generally speed up when passing close to the Sun. The speed of an asteroid is primarily determined by its initial velocity and the gravitational pull of the Sun. While the Sun's gravity can influence the trajectory of an asteroid, it does not typically cause a significant increase in its speed.
The speed of light depends on the electrical characteristics of whatever medium it happens to be in at that instant. It has one speed in vacuum, another speed in air, another in glass, another in water, and yet another speed in jello. When passing from a more-optically-dense medium to one where its speed is higher, it doesn't need a stomp on the gas to 'accelerate' to the higher speed.
It seems that you read or heard something somewhere about gravity changingsomething about light.What you heard was the fact that light passing close to a black hole, or passingeven closer to a star, had its direction change by some amount. There actuallyhasn't been anything in the papers about gravity changing the speed of light,and I don't think anybody has predicted that it should.The effect, predicted by relativity theory and confirmed by observation, does inprinciple, if you want to be totally tehcnical about it, take place as light passes bythe Earth. But the Earth is no black hole, and not even a star. So the gravity nearthe Earth is nowhere near enough to produce an effect big enough to measure.
Not Thomas with an 'H' but without it, Tomas, yes. It happened on the 29th of October 2010, moving through the Windward islands and passing near St. Lucia. However it also affected Hispanola (mostly Haiti) as a tropical storm.
accelerate above the speed limit
gravity isnt your problem, passing through the earth's hot core is.
Light is affected by everything it touches. If it touches a glass of water, it *refracts* (bends).
no. unless you're in a hot boxed area you will not be affected in the least bit if you're literally "passing by", no, it will not.
Define "vertical". If "vertical" means "the direction indicated by a plumb bob," it should be self-evident that yes, gravity is directly vertical. If "vertical" means "in the direction of a line passing through the point in question and the center of the Earth", then not necessarily. On the side of a mountain, the direction of gravity will be affected by the mass of the mountain. However, this is a teeny tiny effect compared to the mass of the Earth as a whole.
Change the fuel filter and have the cat convertor checked out
that gravity affected light, space and time itself, and as a result the Sun would deflect starlight passing by it. Changes in the apparent direction of stars in the sky, seen close to the Sun during a total eclipse, could confirm the idea.
Only partially. Meteoroids passing near Earth are affected by Earth's gravity, but they are traveling far faster than escape velocity, that gravity is usually insufficient to cause an impact. Rather, meteoroids strike Earth and its atmosphere when their trajectories around the sun intersect that of Earth such that they will pass through the same place at the same time. In the case of a near-miss, Earth's gravity will alter an asteroid's or meteoroid's orbit. In some cases this change can lead to a collision later on.
No. Photons have no rest mass and therefore can never accelerate or decelerate; they always travel at precisely the speed of light in the medium they're passing through.
Yes it is acceptable to momentarily accelerate over the speed limit tp get around a vehicle moving slower than the posted speed limit but you must return to the speed limit after passing.
That is called passing an argument by value.
The king could delay the passing of law for 3 years by zil