Please allow me to rewrite about Airy experiment (aberration with a telescope filled with water : 1871) again.
How about the aberration when object lens is removed from the telescope (Main body is a pillar of glass. Incidence face is at right angle to the body) ? This may be a problem as follows : When light enter moving medium from side or diagonal direction, whether light ray is dragged or not (from view of the inertial frame of moving medium) ? A book write, it's unsettled problem (As Airy supposed, is dragging much ?). It may be also a problem as follows : In the moving medium, whether direction of light ray is right angle relative to parallel lines of light waves or not (from view of the inertial frame of moving medium) ? How about the aberration, when a plate glass is set in front of the object lens ?
Sorry, from the last part of yesterday's submission, a few words are missing. Corrected is as follows. : [One more question on aberration] How about the aberration, when a plate glass is set in front of the object lens ?
Long pillar (section is square) made of glass is set horizontally. To the upper face of the pillar, light waves of a star are entering horizontally. These light waves reach bottom face horizontally also (it must be so geometrically). The pillar is supposed to move from the right to the reft because of the motion of the earth. Whether light rays go straight or are bent (from view of the frame of star) ? If it's supposed to go straight, speed of light rays may not be constant in the glass. Therefore, if a book : by A.P.French (i found a word "extinction" in this book "Special Relativity" 1971. It's written that from the incident light, the glass 0.005cm thick is enough to extinguish the memory of light source's motion. What ?? Is the light speed equalized in the medium ?) is right, light rays may be bent (from view of the frame of glass also). And mentioned above may stand up when the glass is replaced with the atmosphere. Explanation on aberration must be revised ?
i am very sorry. Please allow me to rewrite a submission (dated on 26 Jan) as follows (later half is rewritten).
Long pillar (section is square) made of glass is set horizontally. To the upper face of the pillar, light waves of a star are entering horizontally. These light waves reach bottom face horizontally also (it must be so geometrically). The pillar is supposed to move from the right to the reft because of the motion of the earth. Whether light rays go straight or are bent (from view of the frame of star) ?
If light rays go straight, light rays may not be at right angle relative to the light waves (at frame of glass). And speed of both in the glass may differ. It's unreasonable (according to the "extinction" view, the speed of light waves is constant). Therefore light rays may be bent (at frame of star). Light rays must be at right angle relative to the light waves (at frame of glass), and Fresnel drag may not be partial.
In a book "Teoria della relativita" By W.Pauli 1970, it's written as follows. An experiment (to measure Fresnel drag coefficient) was done with the light ray that is emitted at right angle relative to the direction of the motion of medium. About the result, it's not written clearly.
Stellar aberration may be caused by mechanism as follows. From outer space, a light ray of a star is entering atmosphere of the earth. Angle of refraction may be affected by the motion of the earth (it's "drag" by moving medium). If so, the result of Airy experiment (aberration with a telescope filled with water : 1871) may be explained. Analogy with rain-drop may be unsuitable.
In the outer space, the object lens of telescope may "drag" (as a moving medium) the ray (path) of star light. Then, aberration occurs (mechanism is different from the one that occurs in the atmosphere). In the outer space, aberration may occur about hollow tube also (photons pass through as rain drops).
In outer space, the object lens of telescope may "drag" the ray of star light. If it's actual, the value of aberration may be larger (because in the glass, the light speed is slow). It looks a revival of Airy's telescope.
