There is a pillar made of glass (laid horizontally). Light ray (emitted from a light source that is fixed at the left end of the pillar) is passing through this glass (from the left to the right). In front of an observer (at a standstill), one pillar is moving to the right and another pillar is moving to the left at the same speed. To an observer, whether speed of light in the glass is different or not ? (How about, if another light source is fixed at the right end ?)
Allow me to rewrite above thought experiment (dated on 13 Oct) please.
There is a pillar made of glass (laid horizontally). A light ray (emitted from a light source that is fixed at the upper face of the glass) is propagated through the glass like letter V (reflected by a mirror : 30 degrees : from the left to the right). In front of an observer (at a stand-still), one pillar is moving to the right, another pillar is moving to the left at the same speed. To an observer, whether speed of light in the glass is different or not ? [Postscript] Galileo transformation seems to stand up. [Postscript] If another light ray is propagated from the right to the left (on the same path) ?
This is a thought experiment on Fizeau experiment. There is a pillar made of glass (laid horizontally). In this pillar, two laser lights (are propagated to the right and the left) are crossing like letter X. The state of interference fringes may be the same to all (including the one who moves relative to the pillar).
