- foundation - Light waves are coming from just above. Waves are horizontal, because these come from a far star. A triangular prism (set like pyramid) is moving to the right (or to the left). Frequency of two lights that entered both (right and left) slopes of prism, and left prism may not be equal. It may be caused by difference of light speed to both slopes.
- outline of experiment - By change of the direction of prism (on the earth's surface), it may be able to examine, whether above effect exists or not (by interference of lights. Star light must be direct to prism). By this experiment (and if above effect exist), motion of the earth against aether may be detectable easily.
From just above, a ray of light (fine laser beam) is coming. The prism traverses this vertical line. Number of waves that enter both slopes of the prism may not be equal.
If the rotational movement of the earth influence to light, the sky had to change color depending on the distance from the equatorial line. The best experiment: looking at the sky!
> Difference is very little. But now, expected little difference (in old M-M experiment) may come into view (by triangular prism).
A very, very little diference is enought to be visible. The ability of the human eye perception is greater than the relationship between the speed of the Earth and the speed of the light, especially when it comes to long distances (hundreds of kilometers.
Please allow me to add. Imagine an observer. With motion of pin-point of laser beam (that hits the slopes of prism), he moves. Both motions are the same.
Allow me to add a changed (partially) view about "Prism Experiment".
Value of secular aberration is unknown. Then, true position of stars on the celestial sphere is unknown also. Coming direction of star light (visible to come from just above) is uncertain. There is no way to find true direction. However, this situation is not fatal to this thought experiment. Because, about phenomenon of the difference of the number of waves that enter both faces of prism, coming direction of star light is unrelated obviously (when the prism is at standstill against diagonal star light ray, the number of waves that reach optional two points on the both faces of prism is equal). Then, this experiment may disclose the direction of the motion against aether. But how about the speed ? I want entrust it to capable men (but if it's able to measure the wave length of star light directly, the speed of motion against aether may be disclosed by other experiment).
This thought experiment seems to have connection with the Sagnac effect. There is a windmill. At the center of rotation, a light source is fixed (and light waves are emitted as concentric circle). At the tip of one blade, two mirrors are set. Angle of two mirrors to the light source is different (like letter X). When the blade does not rotate (guaranteed by "Newton's bucket"), two reflected lights may be the same : interference fringe may not show any change (interference of two reflected lights is supposed). But when the blade rotate (light source also), how about the interference fringe (it seems to continue changing : passing)? If changing is actual, the reason may be the same to the reason on prism and laser beam that is noted above.
In a forum, someone write, "the number of waves that enter both faces of the prism is equal". When light waves of a star come from just above, pointed out may be right. But when light waves come from a diagonal direction, the number of waves that enter both faces of the prism may not be equal.i add, this experiment must be done in the vacuum of the outer space (such as moon's surface). It's because of the effect "extinction" of the air (about the rest, please see my web-site).
i am very sorry. This "proposal with prism" seems to be invalid. Reason is as follows. The number of light waves that reach optional two points of the face of the prism (per unit time) may be the same always. It's unrelated whether prism moves or is at a stand-still (relative to the light rays). i made mistake on such a simple logic. Alas !As compensation for it, i show my question on M-M experiment below (it's written in other thread of this forum). In a book "Teoria della relativita" By W.Pauli 1970, it's written as follows. "From view point of an observer who moves with moving medium, light must be considered that it's propagated (always and to every direction) at the speed of c/n in this medium" (translated from Japanese edition). In the air, it may be the same. Why it's not an explanation for M-M experiment ? For what reason ?
In a book "Special Relativity" By French, A.P. 1971, it's written that the air 0.1mm thick is enough to extinguish the memory of light source's motion. The notion of extinction seems to be about light speed (in the medium). In a forum (in English), i was shown a web-site below. See a heading "Optical Extinction". http://www.edu-observatory.org/physics-faq/Relativity/SR/experiments.html
i am very sorry. This "proposal with prism" seems to be invalid. Reason is as follows. The number of light waves that reach optional two points of the face of the prism (per unit time) may be the same always. It's unrelated whether prism moves or is at a stand-still (relative to the light rays). i made mistake on such a simple logic. Alas !As compensation for it, i show my question on M-M experiment below (it's written in other thread of this forum). In a book "Teoria della relativita" By W.Pauli 1970, it's written as follows. "From view point of an observer who moves with moving medium, light must be considered that it's propagated (always and to every direction) at the speed of c/n in this medium" (translated from Japanese edition). In the air, it may be the same. Why it's not an explanation for M-M experiment ? For what reason ?
In a book "Special Relativity" By French, A.P. 1971, it's written that the air 0.1mm thick is enough to extinguish the memory of light source's motion. The notion of extinction seems to be about light speed (in the medium). In a forum (in English), i was shown a web-site below. See a heading "Optical Extinction". http://www.edu-observatory.org/physics-faq/Relativity/SR/experiments.html