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ABSTRACT ON examining even the most regularly split and transparent pieces of mica by diffuse reflected light, a few fine hair-like and rather irregular lines may generally be seen running
along the surface. We have found that these lines or striæ show some very interesting effects when mica is examined in a Töpler “Schlieren” apparatus. The sheet as a whole, being optically
good, remains invisible, but the striæ shine out as brilliant and vividly coloured lines of light, the colours being different for different striæ, and changing in a remarkable manner as the
inclination of the mica relatively to the direction of the light in the apparatus is altered. For instance, a stria at normal incidence may appear crimson and, as the mica is rotated about
an axis in its own plane, become successively purple, green, yellowish-green, yellow, orange, scarlet-red, green, yellow, and red. Access through your institution Buy or subscribe This is a
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AUTHORS AND AFFILIATIONS * 210 Bow-bazar Street, Calcutta, India C. V. RAMAN & P. N. GHOSH Authors * C. V. RAMAN View author publications You can also search for this author inPubMed
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ARTICLE RAMAN, C., GHOSH, P. _The Colours of the Striæ in Mica_ . _Nature_ 102, 205 (1918). https://doi.org/10.1038/102205a0 Download citation * Issue Date: 14 November 1918 * DOI:
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