Light-deflection: A light-corpuscle passing by a massive star suffers a deviation .
Law of refraction: The angle of refraction depends on the angle of incidence and on the incident velocity of light .
Refraction on a prism: A light-corpuscle is incident perpendicularly to the first face of a prism of aperture . On the second face it is refracted by an angle . The refraction angle is related to the incident velocity.
Michell’s experiment: Due to the effect of gravity on light, the velocity of the light-corpuscle coming from the heaviest star will be much diminished while the velocity of the light-corpuscle coming from the lighter companion will be less diminished. Because the corpuscles will have different velocities, they will be refracted differently.
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