|
The excerpt represents the core issue or deciding factor on which you must meditate, and is drawn from Faraday as a Discoverer by John Tyndall: that the rotation would be doubled by the act of reflection.
Hence Faraday concludes that the particles of the oil of turpentine
which rotate by virtue of their natural force, and those which
rotate in virtue of the induced force, cannot be in the same
condition. The same remark applies to all bodies which possess a
natural power of rotating the plane of polarization.
And then he proceeded with exquisite skill and insight to take
advantage of this conclusion. He silvered the ends of his piece of
heavy glass, leaving, however, a narrow portion parallel to two
edges diagonally opposed to each other unsilvered. He then sent his
beam through this uncovered portion, and by suitably inclining his
|
