Centuries: 14th century - 15th century - 16th century
Decades: 1350s 1360s 1370s 1380s 1390s - 1400s - 1410s 1420s 1430s 1440s 1450s
Years: 1397 1398 1399 1400 1401 - 1402 - 1403 1404 1405 1406 1407
... Calcite is perhaps best known because of its power to produce strong double refraction of light such that objects viewed through a clear piece of calcite appear ...
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