The London, Edinburgh and Dublin philosophical magazine and journal of science . represent the course of one of the more oblique beams ofparallel waves from the whole surface of the object, the firstfigure representing what occurs when the object is mounted ina medium of the same refractive index as the cover-glass andimmersion oil, and the second figure representing what occurswhen the object is mounted in an optically denser paribus, the ratio of the brightness of the beam thatreaches the objective in the two cases is as cos i/cos r, which 1- sin2? x \ l-sin2>> / where
The London, Edinburgh and Dublin philosophical magazine and journal of science . represent the course of one of the more oblique beams ofparallel waves from the whole surface of the object, the firstfigure representing what occurs when the object is mounted ina medium of the same refractive index as the cover-glass andimmersion oil, and the second figure representing what occurswhen the object is mounted in an optically denser paribus, the ratio of the brightness of the beam thatreaches the objective in the two cases is as cos i/cos r, which 1- sin2? x \ l-sin2>> / where n and n are the refractive indices in the two media, 318 Dr. G. J. Stoney on Microscopic Vision. This is a fraction which the more deviates from unity thegreater r is, i. e. the more oblique the beam. Hence, themore oblique beams, which bring out the finer detail, aremore increased in brightness than the less inclined, whichdeal with the larger features of the object. Hence Proposition 6. Mounting the object in a medium of extra high refractiveindex will, cseteris paribus, in
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Keywords: ., bookcentury1800, bookdecade1840, bookidlondon, booksubjectscience
