Modern microscopy; a handbook for beginners and students (1912)
Cross, M. I, Cole, Martin J · Chicago, Chicago Medical Book Co. · leaf 247
the rate of 22° per mm. of length of the crystal. For differentcolours in the incident polarized white light, the rate of turningis different. Red light, for example, has its plane of vibrationtwisted at the rate of 13° per mm., whilst blue, on the otherhand, is twisted through as many as 33° in… … Fig. 70. — Section of Quartz,Normal to Axis, to show RotaryPolarization. THE USE OF THE PETEOLOGICAL MICROSCOPE 227 passing upwards to the eye, the vibration planes for the red,yellow, and blue will be twisted into the directions RR, YY, andBB respectively, through angles a, /3, and 7, equal to…
Microscopy
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